Class 10 Nso 3 Year e Book Level 2 14

8/15/2019 Class 10 Nso 3 Year e Book Level 2 14

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INSTANT

10

3 years (2012 -2014)

SOLVED PAPERS

Level 2


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Copyright© 2014 Science Olympiad Foundation. Printed with the permision of Science Olympiad Foundation. No part of

this publication may be reproduced, transmitted, in any form or by any means, electronic, mechanical, photocopying,recording or otherwise, without the prior permission of the copyright holder. Ownership of an ebook does not give the possessor the ebook copyright. All disputes subject to Delhi jurisdiction only.

Disclaimer : The information in this book is to give you the path to success but it does not guarantee 100% success asthe strategy is completely dependent on its execution. And it is based on last years papers of NSO exam.

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InternationalMathematics

Olympiad


Olympiad


Olympiad

NationalScience

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NationalScience

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NationalScience

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NationalCyber

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NationalCyber

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InternationalEnglish

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Olympiad


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MTGCSS

Series

MTGCSS

Series

MTGCSS

Series

MTG WORKBOOKS / OLY MPIAD BOOKS

CLASS 1

CLASS 2

CLASS 3


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Olympiad

Math IQChallenge

Math IQChallenge


Olympiad

NationalScience

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Science IQChallenge

Science IQChallenge

NationalScience

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NationalCyber

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Psychology of Success

NationalCyber

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Olympiad

The Secrets of SUCCESS


Olympiad

MTGCSS

Series

Master MentalAbility in 30 Days


MTGCSS

Series


CLASS 7

CLASS 8


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Olympiad

NationalScience

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NationalCyber

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CLASS 10

InternationalMathematicsOlympiad

NationalScienceOlympiad

NationalCyber Olympiad

InternationalEnglishOlympiad

CLASS 9

Math IQChallenge

Science IQChallenge




Math IQChallenge

Science IQChallenge





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NationalCyber

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NationalScience

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CLASS 12

NationalCyber Olympiad

InternationalMathematicsOlympiad

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CLASS 11

Math IQChallenge

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Class

1 to 10


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FOUNDATION COURSEFor Classes 8, 9 & 10

JEE Main & Advamced | AIPMT | BOARDS | OLYMPIAD | NTSE

Class 8

Class 9

Class 10


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Changes in the Mode and Pattern in SOF Level 2 Exams for year 2014- 2015

Exam Date : 7th and 8th February 2015. Kindly coordinate with your school coordinator for exactdate and center for exam. Write to [email protected] for any query related to it.

Mode of exam : NCO/ NSO/ IMO Level 2 for the academic year 2014-15 will be an Online Test

Pattern of the exams : NATIONAL CYBER OLYMPIAD

Class Section No. of Questions Marks per Question Total Marks

3 to 4Computers & IT 30 1 30Achievers Section 5 2 10Grand Total 35 40

5 to 12Computers & IT 45 1 45Achievers Section 5 3 15Grand Total 50 60

NATIONAL SCIENCE OLYMPIAD


3 to 4Science 30 1 30Achievers Section 5 2 10Grand Total 35 40

5 to 10Science 45 1 45Achievers Section 5 3 15Grand Total 50 60

11 and 12

Physics & Chemistry 25 1 25Achievers Section 5 3 15Mathematics/Biology 20 1 20Grand Total 50 60

INTERNATIONAL MATHEMATICS OLYMPIAD


3 to 4 Mathematics 30 1 30Achievers Section 5 2 10Grand Total 35 40

5 to 12Mathematics 45 1 45Achievers Section 5 3 15Grand Total 50 60


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Year 2011-12

14th

LEVEL - 2


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2 | 14 th NSO | Level-II | Class 10

MENTAL ABILITY

1. Two numbers are chosen from 1 to 5. The probability for the two numbers to be consecutive is ____.

(A) 15

(B) 25

(C) 1

10 (D)

45

2. What should be added to 5cos 245° + 4(sin 460° + cos 430°) – 3(tan 260° – tan 245°) to get 3?

(A) –3/4 (B) 2 (C) 3 (D) 3/4

3. One of the roots of x (3 x 2 – 19) = 2( x 2 – 11) is in the form a b c . Find the value of a .

(A) 1 (B) –2/3 (C) 2/3 (D) 373

4. If sin q + sin 2 q = 1, cos 2 q + cos 4 q =

(A) 0 (B) 2 (C) 1 (D) 2

5. If A stands for 'not equal to', B stands for 'greater than', C stands for 'not less than', D stands for'equal to', E stands for 'not greater than', F stands for 'less than', then according to the givenpremises (4 x F 5y ) and (5 y E 3s ), which of the following inferences is correct?

(A) 4 x A 3s (B) 4 x B 3s (C) 4 x C 3s (D) 4 x D 3s

6. Mohit correctly remembers that his father's birthday is not after eighteenth of April. His sistercorrectly remembers that their father's birthday is before twentieth but after seventeenth of April.On which day in April was their father's birthday ?

(A) Seventeenth (B) Nineteenth (C) Eighteenth (D) None of these

7. The present age of a father is equal to the sum of ages of his 5 children. Eight years hence the sumof the ages of his children will be six years less than twice the age of their father. Find the presentage of the father.

(A) 45 years (B) 40 years (C) 30 years (D) 35 years

8. In a certain code language, '3a, 2b, 7c' means 'truth is eternal'; '7c, 9a, 8b, 3a' means 'enmity is noteternal' and '9a, 4d, 2b, 8c' means 'truth does not perish'. Which of the following means 'enmity'in that language?

(A) 3a (B) 7c (C) 8b (D) 9a

9. 20 years ago, when my parents got married, their average age was 23 years. Now the average ageof my family consisting of myself and my parents is 34 years. What is my present age?

(A) 12 years (B) 16 years (C) 36 years (D) 6 years

10. If the numbers from 5 to 85 which are exactly divisible by 5 are arranged in descending order, whichwould come at the eleventh place from the bottom?

(A) 55 (B) 45 (C) 50 (D) 60

11. The digits of a positive integer, having three digits are in A.P. and their sum is 15. The numberobtained by reversing the digits is 594 less than the original number. Find the number.

(A) 582 (B) 852 (C) 258 (D) 825


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3 14 th NSO | Level-II | Class 10 |

12. A conical vessel of radius 6 cm and height 8 cm is filled with water. A sphereis lowered into the water and its size is such that when it touches the sides ofthe conical vessel, it is just immersed. How much water will remain in the coneafter the overflow?

(A) 182.89 cm 3

6cm

8 c m

(B) 113.14 cm 3

(C) 188.57 cm 3

(D) None of these

13. PQRS is a straight line. R is the midpoint of QS and Q is the midpoint of PS. S is (6, 5) and R is(3, 5). Find the coordinates of P.

(A) (0, 5) (B) (–6, 5) (C) (–3, 4) (D) (–5, 6)

14. The minimum number of colours required to paint all the sides of a cube so that no two adjacentfaces may have the same colours, is ____.

(A) 1 (B) 2 (C) 3 (D) 6

15. A plane is observed to be approaching the airport. It is at a distance of 12 km from the point ofobservation and makes an angle of elevation of 60°. Find its height above the ground in kilometres.

(A) 10.392 km (B) 11.398 km (C) 14.893 km (D) 12.613 km

SCIENCE

16. Which of the following graphs correctly represents the variation of acceleration due to gravity( g )with distance ( d ) from the centre of the earth?

(A) g

d

(B)

d

g (C)

g

d

(D) g

d

17. Read the following statements and mark the correct option.Statement 1 : The possibility of an electric bulb fusing is higher at the time of switching on and off.Statement 2 : Inductive effect produces a surge at the time of switch-off and switch on.

(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

(C) Statement 1 is true and statement 2 is false. (D) Both statements 1 and 2 are false.

DIRECTION (Q.Nos. 18 & 19) : A potential difference of 12 V is causing electrons to flow through a wireso that 20 × 10 20 electrons pass a point in the wire in 1 minute.

18. The charge which passes the point in 1 minute, if the charge of each electron is 1.6 × 10 –19 C.

(A) 16 C (B) 320 C (C) 40 C (D) 42 C

19. The electric current in the wire is ____.

(A) 0.35 A (B) 0.43 A (C) 0.48 A (D) 5.3 A

20. In the given smooth curved road, if a particle is released from A then _____.(A) Kinetic energy at B must be mgh (B) Kinetic energy at B may be zero

m A

h

B

(C) Kinetic energy at B must be less than mgh (D) None of these


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21. The figure shows an object placed in front of a plane mirror XY . 1, 1

2

3

P

Q

object X

Y

2 and 3 are the three positions where the image of object may be seen.

Observer P is able to see the image at 2. Where does the observer

Q see the image of the object?

(A) 1 (B) 2 (C) 3 (D) 1 and 3

22. A bullet of mass m moving with a velocity v , strikes a wooden block of mass M and gets embeddedin the block which was initially at rest. The final speed of the system is ____.

(A) M

vm M + (B)

mv

M m + (C) m

vm M

æ öç ÷è + ø (D)

M m vM +æ ö

ç ÷è ø

23. A man who wears glasses of power 3 D must hold a newspaper at least 25 cm away to see the print

clearly. If he took off the glasses and still wanted clear vision then at what distance he must hold

the newspaper?

(A) 1 m (B) 2 m (C) 3 m (D) 4 m

24. Many houses have an electricity meter that is read so that the cost of the electricity used by thecustomer may be calculated. What does the electricity meter record?

(A) Charge (B) Current (C) Energy (D) Power

25. ABCD is a square loop made of a uniform conducting wire. The current enters the loop at A and

leaves at B. The magnetic field is _____.

(A) Zero only at the centre of the loop

A B

CD

(B) Maximum at the centre of the loop

(C) Zero at all points outside the loop (D) Zero at all points inside the loop

26. Most of the sources of energy we use represent stored solar energy. Which of the following is not

ultimately derived from the Sun's energy?

(A) Geothermal energy (B) Wind energy (C) Nuclear energy (D) Biomass

27. Match column I with column II and select the correct option from the codes given below.

Column I Column II

(a) Fe 2O 3 + 3CO ¾¾® 2Fe + 3CO 2 (i) Displacement reaction(b) ZnCO 3 ¾¾® ZnO + CO 2 (ii) Redox reaction(c) H 2O 2 (aq) light ¾¾¾® H2 + O 2 (iii) Thermal decomposition(d) 2Na + 2H

2O ¾¾® 2NaOH + H

2(iv) Photochemical reaction

(A) (a) - (i), (b) - (iii), (c) - (iv), (d) - (ii) (B) (a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)

(C) (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii) (D) (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)

28. A few elements in the order of decreasing reactivity are : K > Ca > Mg > Fe > H > Sb > Au. Identify

the incorrect statement.

(A) Au is the weakest reducing agent. (B) K is the strongest oxidising agent.

(C) The oxide of tin can be reduced with hydrogen.

(D) Ca displaces hydrogen from water more easily than Fe.


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29. The given figure shows the plant for the formation of

an important compound X. Identify X.

(A) Washing soda

Chlorine

X

Slaked limeWaste gases

Rotating shaftwith blades

(B) Common salt

(C) Baking powder

(D) Bleaching powder

30. Which of the following is(are) true when HCl (g) is passed through water?

I. It does not ionise in the solution as it is a covalent compound.

II. It ionises in the solution.

III. It gives both hydrogen and hydroxyl ion in the solution.

IV. It forms hydronium ion in the solution due to the combination of hydrogen ion with water

molecule.

(A) I only (B) III only (C) II and IV (D) III and IV

31. Naresh took three test tubes labelled as X, Y and Z.

Air

Unboiledwater

X Y Z

Ironnails

AirLayer of oil

Boiled water

AnhydrousCaCl 2

Then he placed two iron nails in each of the test tube

and added 10 mL of cold water to test tube X, 10 mL

boiled water to test tube Y. Then he added 1 mL vegetable

oil to test tube Y and poured 2 g of anhydrous CaCl 2to test tube Z. He allowed all the three test tubes to

stand for few days. After a few days he did not observe

corrosion in

(A) Only Y (B) Y and Z (C) X and Y (D) X, Y and Z

32. Read the following statements and select the correct option.

Statement 1 : Aluminium can be extracted from anhydrous aluminium chloride.

Statement 2 : AlCl 3 is a covalent compound.

(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

(B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

(C) Statement 1 is true and statement 2 is false. (D) Statement 1 is false and statement 2 is true.

33. Two compounds X and Y have same molecular formula, C 6H12 . Compound X is saturated while Y is

unsaturated. What are the names of the compounds X and Y? What type of reactions compounds

X and Y are expected to undergo respectively?(A) Hexane, Hexene; Addition, Substitution (B) Hexene, Hexane; Addition, Substitution

(C) Cyclohexane, Hexene; Addition, Substitution (D) Cyclohexane, Hexene; Substitution, Addition

34. Identify Q and S.C H + Cl2 6 2

sunlightQ

aq. KOH[O]

K2Cr 2 O 7R SC H OH2 5

C H OH2 5

(A) Q = Chloroethene, S = Ester

(B) Q = Chloroethene, S = Ethanoic acid

(C) Q = Chloroethane, S = Ester

(D) Q = Chloroethane, S = Ethanoic acid


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35. The element carbon occurs in 3 allotropic forms X, Y and Z. X is formed of hexagonal arrays placedin layers one above the other, while Y has a rigid three-dimensional structure. Z has carbon atomsarranged in football shape. Identify X, Y and Z.

X Y Z(A) Graphite Coke Diamond (B) Fullerene Coke Graphite (C) Coke Graphite Fullerene (D) Graphite Diamond Fullerene

36. Observe the map carefully. IdentifyP, Q, R and S.

P Q R S

Periodic properties

Atomic sizeincreases

Ionisation potential

Electron affinity

decreases

decreases

decreases

increases

increases

increases

decreases

decreases S

increases

increases

Electronegativity,non-metallic nature

Electropositivity/Metallic nature

Oxidising property

QP

decreases

R

(A) Group Period Period Group

(B) Group Period Group Period

(C) Period Group Group Period

(D) Period Group Period Group

37. X and Y are two elements having similar properties which obey Newland’s law of octaves. Theminimum and the maximum number of elements in between X and Y respectively are

(A) 6 and 8 (B) 6 and 13 (C) 7 and 15 (D) 8 and 14

38. Two groups of students are given 5 g of iron filings and 3 g of sulphur powder each. Group X isasked to mix and crush the mixture. Group Y is asked to mix, crush and heat the mixture strongly.

The resulting molten mass is then left to cool. Both the groups were asked to separate the componentsby using magnet. Which group will be able to do so?

(A) Group X (B) Group Y (C) Both X and Y (D) Neither X nor Y

39. Refer the given graph and answer the following question.(i) The population of tiger decreases because there were more deaths than

births.(ii) The population of tiger decreases because there were more births than

deaths.(iii) The population of tiger decreases because the population of deers

increases.(iv) The population of tiger decreases because of a deadly disease, infecting the deer population.

Which of the given statements is/are correct ?(A) (i) only (B) (i) & (iv) (C) (ii) & (iii) (D) (i), (iii) & (iv)

40. In the given food web an insecticide is sprayed to killthe caterpillars. In which organisms will the highestlevel of insecticide accumulate after a period of time ?(A) Foxes

Grains Hogweed China roseplants

Mulberrytrees

Mice

Foxes

Rabbits Goldfinches Aphids Caterpillars

Sparrows

Hawks

(B) Hawks (C) Mice (D) Sparrows


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41. Match Column I with Column II and select the correct option from the codes given below.Column I Column II

(a) Growth of pollen tube towards embryo sac (i) Thigmonasty(b) Opening of flower (ii) Siesmonasty(c) Turgor movement (iii) Epinasty(d) Bending of tentacles of Drosera over the insect (iv) Chemotropism

(A) a-(i), b-(ii), c-(iii), d-(iv) (B) a-(iv), b-(iii), c-(ii), d-(i)

(C) a-(ii), b-(iii), c-(i), d-(iv) (D) a-(iii), b-(iv), c-(ii), d-(i)

42. The given diagram shows a section through the human heart. What happens when blood is pumpedto the lungs ?

Valve Vessel through which bloodaction passes to the lungs

(A) b closes 3 a b

1

2 34

(B) b opens 4

(C) a closes 2

(D) a opens 1

43. Match Column I with Column II and select the correct option from the codes given below.Column I Column II

(a) Condom (i) Stops ovulation(b) Diaphragm (ii) Prevents implantation(c) IUD (iii) Collects semen during ejaculation(d) Oral contraceptive (iv) Stops eggs from reaching the uterus(e) Tubectomy (v) Prevents sperms from entering the uterus

(A) a-(v), b-(iii), c-(ii), d-(i), e-(iv) (B) a-(iii), b-(v), c-(ii), d-(i), e-(iv)

(C) a-(iii), b-(v), c-(ii), d-(iv), e-(i) (D) a-(iii), b-(ii), c-(v), d-(i), e-(iv)

44. Which of the following parts in the given figure are labelled incorrectly ?

(A) Synergids, funiculus & antipodal cells Nucellus

Synergids

Embryo sac

Funiculus

Antipodalcells

(B) Synergids, nucellus & antipodal cells

(C) Synergids, funiculus & embryo sac

(D) Synergids & antipodal cells

45. Which of the following statements is correct ?

(A) Mendel's experiments gave us the mechanism for the inheritance of traits from one generation to the next.

(B) Mendel's findings remained unknown until these were rediscovered by Hugo de Vries in 1900.

(C) Natural selection is based on the isolation of natural populations and selective breeding of organisms.

(D) Both (A) & (B)

46. Which of the following is an incorrect match ?

Column I Column II(Examples) (Connecting links)

(A) Egg laying mammals Reptiles & mammals

(B) Lung fish Fishes & amphibians

(C) Peripatus Annelida & Arthropoda

(D) Archaeopteryx Birds & mammals


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47. Rohit categorized the functions of different lobes of cerebral hemisphere as given in the table below.

Group A

Smell, touch, temperatureand conscious association

Group B

Auditory reception

Group C

Muscular activities

Group D

Visual reception

Which of the following have the correct headings for the given table ?

Group A Group B Group C Group D

(A) Temporal lobe Parietal lobe Frontal lobe Occipital lobe (B) Temporal lobe Parietal lobe Occipital lobe Frontal lobe

(C) Parietal lobe Temporal lobe Frontal lobe Occipital lobe

(D) Parietal lobe Temporal lobe Occipital lobe Frontal lobe

48. Bolting in some plants is induced by artificial treatment with which of the following plant hormones?

(A) Ethylene (B) Auxin (C) Abscisic acid (D) Gibberellin

49. Which structure out of (i), (ii), (iii) and (iv) marked in the given figure

of the epidermal peel of leaf should be labelled as stoma ?

(A) (i)

(i)

(ii) (iii)(iv)(B) (ii)

(C) (iii)

(D) (iv)

50. Khadins, Bundhis, Ahars and Kattas are traditional means of _____.

(A) Grain storage (B) Wood storage (C) Water harvesting (D) Soil conservation

SPACE FOR ROUGH WORK


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15 th

LEVEL - 2

Year 2012-13


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| 15 th NSO | Level-II | Class 10 2

MENTAL ABILITY

1. Both the roots of the equation ( x – a )( x – b ) + ( x – b )( x – c ) + ( x – c ) ( x – a ) = 0 are real but they

are equal only when ________.

(A) 2b = a + c (B) a = b = c (C) a

bc = (D) a – b = 2c

2. A reservoir is in the shape of a frustum of a right circular cone. It is 8 m across at the top and4 m across at the bottom. It is 6 m deep, its capacity is ________.

(A) 224 m 3 (B) 176 m 3 (C) 225 m 3 (D) 484 m 3

3. Ashwini, Priya, Sudha, Rani, Meera, Geeta and Mukta are sitting around a circle facing the centre.

Ashwini is third to the left of Mukta and to the immediate right of Rani. Priya is second to the left

of Geeta, who is not an immediate neighbour of Meera. Who is to the immediate right of Priya? (A) Meera (B) Sudha (C) Mukta (D) Ashwini

4. Calculate the value of mode for the following frequency distribution.

ClassFrequency

1 - 4 5 - 8 9 - 12 13 - 16 17 - 20 21 - 24 25 - 28 29 - 32 33 - 36 37 - 402 5 8 9 12 14 14 15 11 13

(A) 24.5 (B) 26 (C) 23.5 (D) 29.3

5. If sec = + 14

,θ x x

then sec q + tan q = ________.

(A) 2x (B) 1

2 x (C) – 2x (D) Both (A) and (B)

6. In the given diagram, O is the centre of the circle and AC is the diameter. If ADB = 120° and the

radius of the circle is 6 cm, what is the area of the D ABC ?

(A) 18 3 cm 2 (B) 24 3 cm 2 (C) 27 cm 2 (D) Data insuf cient

7. A factory kept increasing its output by the same percentage every year. Find the percentage if it

is known that the output is doubled in the last two years.(A) 50 1 3( )%± (B) 100 1 2( )%− + (C) 50% (D) 84%

8. The sum of the rst six terms of an A.P. is 42. The ratio of the 10 th term to the 30 th term of A.P.

is 13

. Find the 40 th term of the A.P.

(A) –60 (B) 20 (C) 39 (D) 80

9. Four points A (6, 3), B (–3, 5), C (4, –2) and D( x , 3 x ) are given in such way thatarea DBC

area ABC

( )( )

= 12

∆∆

,

nd x .

(A) 118

38

, (B)118

38

, − (C) −11

838

, (D) − −118

38

,

10. Find the values of k for which the following system of equations have in nitely many solutions.

2 x + 3 y = 7 ; ( k + 1) x + (2 k – 1) y = 4 k + 1

(A) 5 (B) 7 (C) 2 (D) 94


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15 th NSO | Level-II | Class 10 |3

11. In the given gure, CD is a direct common tangent to two circles intersecting each other at A and

B, then CAD + CBD = ______.(A) 120°(B) 90° (C) 360°

(D) 180°

12. A hemispherical bowl of internal radius 6 cm contains milk. This milk is to be lled into cylindrical

shaped small bottles of diameter 6 cm and height 1 cm. How many bottles will be needed to empty

the bowl? (A) 36 (B) 27 (C) 16 (D) 4

13. Cards with numbers 2 to 101 are placed in a box. A card is selected at random from the box. Find

the probability that the selected card has a number which is a perfect square.

(A) 11100

(B) 110

(C) 7100

(D) 9100

14. A ladder rests against a wall at an angle a to the horizontal. Its foot is pulled away from the wall

through a distance a , so that it slides a distance b down the wall making an angle b with the

horizontal. Then, cos cossin sin

α ββ α

−−

= ______.

(A) a b+2

(B) 2a + b (C) ab

(D) 1

15. Showing a photograph Rajeev told Shweta, "His mother is the only daughter of your father." How

is Shweta related to the man in the photograph? (A) Aunt (B) Mother (C) Wife (D) Daughter

SCIENCE

16. What happens to light as it passes from glass into air? (A) Its frequency decreases because its speed decreases. (B) Its frequency increases because its speed increases.

(C) Its wavelength decreases because its speed decreases.(D) Its wavelength increases because its speed increases.

17. In the given gure, a cell is connected in series with an ammeter and

three resistors 10 W, 20 W and 30 W. The circuit can be completed by

a movable contact M .

When M is connected to X , the ammeter reads 0.6 A.

2010 30M A

X Y

What is the ammeter reading when M is connected to Y ? (A) 0.1 A (B) 0.2 A (C) 0.3 A (D) 0.6 A

18. Read the given statements and choose the correct option.

Statement 1: A current carrying loop placed in a uniform magnetic eld experiences no net force.

Statement 2: The net charge on a current carrying loop is zero.

(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true, but statement 2 is not the correct explanation of statement 1. (C) Statements 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true.


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19. Two spherical mirrors (convex and concave) having the same focal length ofO

1 m

36 cm are arranged so that their optical axes coincide. The separation between

the mirrors is 1 m. At what distance from the concave mirror should an object

be placed so that its images formed by the concave and convex mirror

independently are identical in size? (A) 86 cm in front of concave mirror (B) 76 cm in front of the concave mirror

(C) 56 cm in front of concave mirror (D) None of these

20. A weather forecasting plastic balloon of volume 15 m 3 contains hydrogen of density 0.09 kg m –3 .

The volume of the equipment carried by the balloon is negligible compared to its own volume.

The mass of the empty balloon alone is 7.15 kg. The balloon is oating in air of density 1.3 kg m –3 .

The total mass of oating body is ________. (A) 22 kg (B) 19.5 kg (C) 11 kg (D) 8.5 kg

21. A juggler usually tosses balls vertically to a height H . To what height must they be tossed if they

are to spend twice as much time in the air? (A) 4 H (B) 2 H (C) H (D) H / 2

22. An optician while testing the eyes nds the vision of a patient to be 6/12. By this he means that (A) The person can read the letters of 6 inches from a distance of 12 m.

(B) The person can read the letters of 12 inches from 6 m. (C) The person can read the letters from 6 m which the normal eye can read from 12 m.

(D) The focal length of eye lens had become half that of the normal eye.

23. The electric light switch for a bathroom is sometimes tted on the wall outside the bathroom.

Why is this safer than tting the switch on the wall inside the bathroom? (A) The heat from the light affects the switch.

(B) The person in the bathroom may be electrocuted if water enters the switch.(C) The switch is less likely to be damaged outside the bathroom.(D) The warm air in the bathroom causes the switch to overheat.

24. Fusion reaction is also known as ______. (A) Chemical reaction (B) Elastic reaction

(C) Thermonuclear reaction (D) Photonuclear reaction

25. A stream of electrons is projected horizontally to the right. A straight conductor carrying a current

is supported parallel to the electron stream and above it. If the current in the conductor is from

left to right, what will be the effect on the electron stream? (A) The electron stream will be pulled upwards. (B) The electron stream will be pulled downwards.

(C) The electron stream will be retarded.(D) The electron stream will speedup towards the right.

26. A particle is moving along a circular path of radius 5 m and with uniform speed 5 m s –1 . What will

be the average acceleration when the particle completes half revolution? (A) 10 p m s –2 (B) 10/ p m s –2 (C) 10 m s –2 (D) Zero

27. Balance the given reaction and nd the values of w, x, y and z. Also, identify the type of

reaction.

w Potassium bromide (aq) + x Barium iodide (aq) → y Potassium iodide (aq) + z Barium bromide (aq)

(A) 1, 1, 1, 1; Double displacement reaction (B) 1, 1, 1, 1; Decomposition reaction (C) 2, 1, 2, 1; Double displacement reaction (D) 2, 1, 2, 1; Decomposition reaction


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28. Coloured petals of some owers indicate the presence of acid or base in a solution. Example of

such owers is (A) Hydrangea (B) Petunia (C) Geranium (D) All of these

29. Study the given table carefully.

Substances Blue litmussolution

Phenolphthalein Methyl orange China roseindicator

1. Wasp's sting Red Colourless Red Red

2. Lime water No change Pink Yellow Green3. Spinach No change Pink Yellow Green

4. Window cleaner Red Colourless Red Red

5. Curd Red Colourless Red Red

Which of them shows the incorrect change in the colour of indicators? (A) 1 and 2 (B) 3 and 5 (C) 1, 2 and 3 (D) 1, 3 and 4

30. The following reactions evolve gases along with other products.

(1) NaHCO

3 + HCl (2) NaOH + Zn

(3) NaCl + H 2O (4) MnO 2 + HCl(5) CH 4 + O 2

Identify the gases evolved in the above reactions. (A) (1, 5) - CO 2, (2) - H 2, (3) - Cl 2 and H 2, (4) - Cl 2

(B) (1, 3) - H 2 and Cl 2, (2) - H 2, (4) - Cl 2, (5) - CO 2 (C) (1) - CO 2 and Cl 2, (2, 5) - H 2, (3) - Cl 2, (4) - H 2 and Cl 2 (D) (1) - H 2 and Cl 2, (2, 4) - H 2, (3, 4) - Cl 2

31. In which reaction does the product have more carbon atoms than the underlined reactants? (A) A carboxylic acid produced from an alcohol and an oxidising agent.

(B) An ester produced from a carboxylic acid and an alcohol. (C) A salt produced from a carboxylic acid and sodium carbonate. (D) Carbon dioxide produced from the complete combustion of propane in oxygen.

32. The formulae of four covalent molecules are given.

1. H 2O 2. CO 2 3. CH 3OH 4. CH 3COOH

In which pair of molecules does oxygen form at least one double bond? (A) 1 and 2 (B) 1 and 3 (C) 2 and 4 (D) 3 and 4

33. An ester of molecular formula C 4H8O 2 was produced by the reaction of an alcohol with a carboxylic

acid.

Alcohols Acids1 Methanol Propanoic acid

2 Ethanol Ethanoic acid

3 Propanol Methanoic acid

Which of the following could be the alcohol and the acid? (A) 2 (B) 1 and 2 (C) 1 and 3 (D) 1, 2 and 3

34. Many properties of an element and its compounds can be predicted from the position of that

element in the periodic table. What property could not be predicted in this way? (A) The acidic or basic nature of its oxide (B) The formula of its oxide

(C) The number of isotopes it has (D) Its metallic or non-metallic properties


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35. Elements X and Y are in group VII of the periodic table. X is a liquid while Y is a solid at room

temperature. Which statement is correct? 1. Atoms of Y have more protons than atoms of X. 2. Molecules of Y have more atoms than molecules of X. 3. Y displaces X from aqueous solution of X – ions. (A) 1 (B) 2 (C) 3 (D) All of them

36. How many different chlorides in total could be prepared by the reaction of dilute hydrochloric acid

with the following substances?

Copper, Magnesium, Silver, Zinc carbonate (A) 1 (B) 2 (C) 3 (D) 4

37. The diagram shows some parts of the periodic table with few elements. Identify the set of two

elements which combine together to form a covalent compound with a formula of the type XY 3. (A) 2 and 3 1

4 75

62

3

(B) 4 and 6(C) 5 and 7

(D) 1 and 738. Which metal when attached to an iron pipe immersed in sea water, would prevent rusting of the

iron? (A) Copper (B) Lead (C) Magnesium (D) Silver

39. The organisms shown in gure can be grouped into two separate groups based on their mode ofnutrition.

Which of the following options is correct regarding this? (A) P is an autotroph whereas Q, R and S are heterotrophs.

(B) P and R show intracellular digestion while Q and S show extracellular digestion.(C) P and Q are autotrophs while R and S are heterotrophs.(D) P shows intracellular digestion while Q, R and S show extracellular digestion.

40. Read the following statements with respect to the given diagram.

(i) A major amount of carbohydrates is digested in P.

(ii) Chief fat digesting enzyme is present in R.(iii) Digestion of proteins and fats starts in T.

(iv) Enzymes trypsin and chymotrypsin are produced in S.

(v) Enzyme responsible for curdling of milk is present in P. Which of the above statements are correct?

(A) (i), (ii) and (iv) (B) (ii) and (v)(C) (iii), (iv) and (v) (D) (ii), (iv) and (v)

41. When the Fallopian tubes in a woman are cut and tied, ______. (A) She becomes sterile (B) She stops ovulating

(C) She stops producing sex hormones

(D) The embryo cannot get implanted in the uterus


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42. Nidhi set up an experiment as shown in the gure. At the start

of the experiment, water level in the passing tube was at X,

but later on it reached the point Y. Which process occurring

in the seeds has lead to the observed change?

(A) Aerobic respiration (B) Anaerobic respiration(C) Photosynthesis (D) Transpiration

43. Refer the given gure which shows a section of plant roots

having a root hair. Which of the following statements is

correct for absorption of water to occur? (A) The water potential of the soil water is zero.

(B) The water potential of cell Z is the lowest. (C) The water potential of cell Y is higher than cell X. (D) The water potential of cell Y is lower than cell Z.

44. Refer the given gure which shows part of the urinary system of a mammal.

Liquids pass through tubes X, Y and Z in the directions shown by the

arrows. The volume of liquid passing through Y in a day is (A) Greater than that passing through X.

(B) Less than that passing through Z. (C) Much less than that passing through X but slightly greater than that passing through

Z. (D) Slightly less than that passing through X but much greater than that passing through

Z.

45. Refer the given diagram of a typical dicotyledonous seed with

a labelled part Q. Which of the following is correct regarding it? (A) Part Q is well laden with nutrients and serves as a food reserve.

(B) The rst two leaves seen in a seedling are always formed by part Q. (C) Part Q gives rise to the stem, leaves and parts of shoot system of the new plant. (D) Both (B) and (C)

46. Read the following statements. I. In a food chain, there is multidirectional ow of energy from sun to producers, consumers

and decomposers.II. Shorter food chains provide more energy as compared to longer food chains.

III. In an ecosystem, no food chain is independent. IV. If 100 joules of energy is available at the producer level, then amount of energy present at

the level of secondary consumers is 10 joules.

Which of these statements are correct? (A) I and II (B) II and III (C) III and IV (D) I and IV

47. Match phytohormones in Column - I with their respective functions in Column - II and select the

correct option from the codes given below. Column - I Column - II a. Cytokinins (i) Closing of stomata during stress conditions b. Gibberellins (ii) Elongation of stem c. Ethylene (iii) Ripening of fruits d. Abscisic acid (iv) Cell division and cell enlargement (A) a-(iv), b-(i), c-(iii), d-(ii) (B) a-(ii), b-(iv), c-(i), d-(iii)

(C) a-(iv), b-(ii), c-(iii), d-(i) (D) a-(ii), b-(iv), c-(iii), d-(i)


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48. Read the given statements that Mohit has made during a conversation. (i) I have a strong feeling of hatred for Sudhir. I just cannot tolerate him.

(ii) I cannot control sneezing when I enter a dusty place. (iii) I can ride a bicycle in a steady, straight line. (iv) I withdrew my hand when I touched the hot kettle. Refer the given gure and select the correct match of (i), (ii), (iii) and (iv) that are functionally

associated with parts labelled as W, X, Y and Z of the human brain. (A) W - (ii) (B) X - (iii) (C) Y - (i) (D) Z - (iii)

49. The given gure shows structure of forelimbsof different organisms which are labelled as

P, Q, R and S. Which of the following is incorrect

regarding this?

(A) Q and R both are adapted for the same function i.e .,ying, thus they are analogous organs.

(B) P and S both have same basic structural plan, thusthey are homologous organs.

(C) P and Q are adapted for different functions i.e ., swimmingand ying respectively thus they are analogous organs.

(D) None of these

50. The given gure shows a Kundi i.e., a traditional rainwater

harvesting system used in India. Which of the following

statements is incorrect regarding this? (A) Surface view of the entire structure resembles an upturned cup

put on a saucer.(B) X is made up of an impervious material in order to prevent percolation

of rainwater into the ground.

(C) The Kundi technology was developed by people of Rajasthan'sThar desert.

(D) This technology can be further improved by removing W and Y as they reduce the amount of rainwaterreaching the storage well.



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16 th NSO | Class-10 | Level 22

MENTAL ABILITY

1. Solve the quadratic equation by factorization :

11 2

12 3

13 4

16( )( ) ( )( ) ( )( ) x x x x x x− − + − − + − − =

A. –2, 7B. 3, – 4

C. 5, 2D. 8, 2

2. A man is employed to count ` 10710. He counts atthe rate of ` 180 per minute for half an hour. Afterthis he counts at the rate of ` 3 less every minutethan the preceding minute. Find the time taken byhim to count the entire amount.

A. 98 minutesB. 73 minutes

C. 89 minutesD. 50 minutes

3. In the given gure, there are two concentric circleswith centre O of radii 5 cm and 3 cm. From anexternal point P , tangents PA and PB are drawnto these circles. If AP = 12 cm, nd the length of

BP .

A. 7 3 cm

B. 8 10 cm

C. 4 3 cm D. 4 10 cm

4. If a two digit number is chosen at random, then the probability that the number chosen is a multiple of3, is

A.3

10 B.

7

25

C.1

3 D.

1

30

5. Find the circumcentre of the triangle whose verticesare (–2, 3), (2, –1) and (4, 0).

A. 3252

, B. 35 52 ,

C.3

2

5

3 ,

D. 4

5

5

2 ,

6. The angle of elevation of the top of a hill at thefoot of a tower is 60° and the angle of elevationof the top of the tower from the foot of the hill is30°. If the tower is 50 m high, what is the heightof the hill?

A. 200 m B. 170 m C. 150 m D. 180 m

7. Select a gure from amongst the Answer gureswhich will continue the same series as established

by the ve problem gures.

A. B.

C. D.

8. Which of the following statements is INCORRECT

while constructing a triangle similar to a given triangle

PQR with its sides equal to53

of the correspondingsides of D PQR .

(i) Draw any ray QX making an acute angle with QR on the side opposite to the vertex P .

(ii) Locate 5 points (the greater of 5 and 3 in53

) Q1,

Q 2, Q3, Q4 and Q5 on QX so that QQ 1 = Q1Q 2 =Q 2Q 3 = Q 3Q4 = Q4Q5

(iii) Join Q3 (the 3rd point, 3 being smaller of 3 and 5

in 53

) to P and draw a line through Q5 parallel to Q3 R,

intersecting the extended line segment QR at R′. (iv) Draw a line through R′ parallel to PR intersecting

the extended line segment PQ at P ′. Then P ′QR ′ is the required triangle. A. Only (i) B. Both (i) and (iii) C. Only (iii) D. Only (iv)

9. Study the following information carefully and answerthe question that follows.

(i) A, B, C , D, E and F are six members in a familyin which there are two married couples.

(ii) D is brother of F . Both D and F are lighterthan B.

(iii) B is mother of D and lighter than E . (iv) C , a lady, is neither heaviest nor the lightest in the

family. (v) E is lighter than C . (vi) The grandfather in the family is the heaviest. How is E related to F ? A. Grandmother B. Brother C. Father D. Mother

MENTAL ABILITYMENTAL ABILITYMENTAL ABILITY


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16 th NSO | Class-10 | Level 2 3

10. Select the gure from the options which satis esthe same conditions of placement of the dots as ingure (X).

Figure (X)

A. B.

C. D.

11. From a piece of paper in the shape of a regularhexagon, sectors of circles with the centre at thevertices are removed as shown in the gure. Findthe fraction of the piece of paper left. Also, nd the

perimeter of the piece of paper left in terms of a sideof the hexagon (Take side of regular hexagon = a).

A.3 3

3 32

− π π , a B. 3 33

2

3

− π π , a

C. 3 32

2− π π , a D.

3 2

3 3

3

2− π π , a

12. The digits of the following ve numbers are written inreverse order and ve new numbers are obtained.

513 726 492 865 149 Which of the following will be the middle digit of

the third number from the top when the new numbersare arranged in descending order?

A. 1B. 2

C. 6D. 8

SCIENCE

13. Which of the following statements is true? A. The probability of an impossible event is 0. B. The probability of an event ( E ) is a number P ( E )

such that 0 < P ( E ) < 1 C. An event having only one outcome is called

classical event. D. For any event E , P ( E ) + P ( E ) = 0

14. In D ABC , B = 90°, AB = 12 cm and AC = 15 cm. D and E are points on AB and AC respectively suchthat AED = 90° and DE = 3 cm.

Findar quadrilateral

ar ( )

( ) BCED

ABC D.

A.8

9

B.7

3

C. 43

D. 97

15. There is a de nite relationship between gures 1 and2. Establish a similar relationship between gures3 and 4 by selecting a suitable gure from theoptions that would replace the question mark (?) ingure (4).

A. B.

C. D.

16. Four situations in gure shows how forces act ona block that lies on frictionless oor. If the forcemagnitudes are chosen properly, in which situationsis it possible that the block is moving with a constantvelocity?

A.

B.

C.

D.

17. Read the given statements and select the correctoption. Statement-1 : It is not possible to photograph a

virtual image. Statement-2 : An image is said to be virtual if the

re ected or refracted rays are diverging in nature. A. Both statements-1 and 2 are true and statement-2

is the correct explanation of statement-1. B. Both statements-1 and 2 are true but statement-2

is not the correct explanation of statement-1. C. Statement-1 is true and statement-2 is false. D. Both statements-1 and 2 are false.


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18. The figure shows the current I in a single loop.Circuit with a battery B and a resistor R and wiresof negligible resistance. At points a , b and c rank theelectric potential.

A. V a > V b > V cB. V b > V a = V c

C. V c > V a = V b D. V b > V c > V a

19. The gure shows, the circular paths oftwo particles that travel at the same speedin a uniform magnetic eld B, which isdirected into the page. One particle is a

proton, the other is an electron. Then A. The electron follows bigger circle.

B. The electron follows the smaller circle. C. Both the circles follow by electron only. D. Information not suf cient.

20. Bulb B1 (100 W - 250 V) and bulb B2(100 W-200 V)are connected across 250 V. What is potential drop

across B2? A. 200 V

B. 250 V C. 98 V

D. 48 V

21. A vertical straight conductor carries a current verticallyupwards. A point P lies to the east of it at a smalldistance and another point Q lies to the west at thesame distance. The magnetic eld at P is

A. Greater than at Q B. Same as at Q

C. Less than at Q D. Greater or lesser than that at Q, depending upon

the strength of current.

22. If a small part separates from an orbiting satellite,the part will

A. Fall to the earth directly B. move in a spiral and reach the earth after a few

rotations C. Continue to move in the same orbit as the satellite D. Move farther away from the earth gradually.

23. Current I ows through a conductor connected acrossa voltage source. Now the resistance of the conductoris reduced to half its initial value and connected acrossthe same voltage source. In doing so the heatingeffect in the conductor will become

A. Half B. Double C. One-fourth D. Four times

24. Most of the sources of energy we use represent storedsolar energy. Which of the following is not ultimatelyderived from the sun’s energy?

A. Geothermal energy B. Wind energy C. Fossil fuels D. Biomass

25. Two plane mirrors M 1 and M 2 are inclined at angle q as shown in the gure. A ray of light 1, which is

parallel to M 1 strikes M 2 and after two re ections,the ray 2 becomes parallel to M 2. The angle q is

A. 0°B. 30°

C. 45°

D. 60°

26. Which of the following elements does not form achloride with the formula M Cl ?

A.1939 T

B. 37 R

C.1123 Q

D. 2040 S

27. The electronic con gurations of six elements, U , V ,

W , X , Y and Z are as follows.Elements Electronic confguration

U V W X Y

Z

2, 8, 12, 82, 8, 72, 8, 22, 62, 8, 8, 2

Which of the following is incorrect statement? A. Element V does not react with U , W , X , Y and Z . B. Compounds UW , ZY , U

2Y show high melting and

boiling points. C. Compounds XW 2, XY and ZW 2 are insoluble in

water but soluble in kerosene. D. Compounds UW and U 2Y do not conduct electricity

in solid state.

28. Observe the following reaction. X 2 Z + Y 2 X 2 + Y 2 Z

If Z represents an oxygen atom, then identify thecorrect option.

A. Substance gets oxidised is Y 2 Z . B. Substance gets reduced is X 2 Z . C. Substance gets oxidised is Y 2. D. Both B and C.

29. Which of the following hydrocarbons will undergosubstitution reactions?

(i) C 2H 6 (ii) C 4H 6 (iii) C 3H 6(iv) CH 4 (v) C 4H 10 (vi) C 3H 4 A. (i) and (iv) only

B. (ii), (iii) and (vi) only C. (i), (iv) and (v) only

D. (iii) and (v) only


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30. Given below is the structuralformula of compound formed of

X , Y and Z elements. X is tetravalent element and exhibitscatenation property. Y belongs to group 16 and period2. Z is the only non-metal present in the reactivityseries. The next member of homologous series ofthe above compound is

A. CH 3CHO B. CH 3CH 2CH 2CH 2CHO C. CH 3CH 2CH 2CHO D. None of these.

31. Nikita and Tarun arranged the given set up ofexperiment separately.

Both have performed the above experiment with twodifferent solutions ( Y ). If in case of Nikita, solution(Y ) is dilute hydrochloric acid and in case of Tarun,solution ( Y ) is sodium hydroxide then compoundsformed are______ and ______ respectively.

A. Na 2ZnO 2 and ZnCl 2 B. ZnCl 2 and Na 2ZnO 2 C. ZnSO 4 and Na 2ZnO 2

D. ZnCl 2 and ZnO

32. Different metals P , Q, R, M and T are dipped indifferent salt solutions one by one and the observationsare recorded in the form of given table. Observe thetable carefully.

P Q R M T

T 2SO 4

QSO 4

P 2SO 4

M SO 4

RSO 4

No reactionDisplacement

Identify the metal which is more reactive than P butless reactive than T .

A. M onlyB. R only

C. Q onlyD. Both M and Q

33. Observe the following schematic representationcarefully.

Identify the type of reaction. A. Displacement reaction B. Combination reaction C. Double displacement reaction D. Both (A) and (C).

34. Which of the following statements about the givenreaction are correct?

CuO ( s) + 2HCl(dil.) CuCl 2(aq ) + H 2O (l )(i) CuCl 2 is blue-green coloured solution.(ii) CuO is an acidic oxide.(iii) This is a neutralisation reaction.(iv) CuO is a basic oxide.

A. (i), (ii) and (iii) only B. (i), (iii) and (iv) only C. (ii) and (iii) only D. All the statements are correct.

35. An element M belongs to the group 1 and period 3of the modern periodic table. Out of the followingstatements, which is true about ' M '?A. It forms an acidic oxide having formula M 2O 3.

B. It is a non-metal. C. It is highly electropositive in nature. D. It has a valency of three.

36. Mendel studied the inheritance patterns of 12 different pairs of characters of the pea plant. He could ascertainthe independent assortment for only 7 of these 12

pairs of characters by repeated experiments. What

can be deduced from this?A. The pea plant could have at least seven pairs of

chromosomes. B. The pea plant can have a maximum of seven pairs

of chromosomes. C. The pea plant has exactly seven pairs of

chromosomes. D. The pea plant can have haploid chromosome

number between 7 and 12 only.

37. In an individual X, the partlabelled P was found to function

normally while the part labelled Qwas atrophied. In another individualY, both the parts labelled P and Qwere found to be underdeveloped.If adrenocorticotropic hormone(ACTH) is administered to theseindividuals as a remedy, it will beeffective in_______.

A. Individual X aloneB. Individual Y alone

C. Both individuals X and Y D. Neither individual X nor Y


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ACHIEVERS SECTION

44. The given diagram shows a part of a food-web.Which of the following is a pyramid of numbers

based on this food-web?

A.

B.

C. D.

45. Which one of the following statements is correct inexplaining the feedback control mechanisms regulatingthe reproductive cycles in human female?

A. Whereas a slow rise of progesterone inhibits thesecretion of FSH and LH, high concentrationof progesterone have the opposite effect andstimulates the secretion of FSH and LH from theanterior pituitary.

B. Whereas high concentration of estrogen inhibitsthe secretion of pituitary gonadotropins, lowconcentration of estrogen have the opposite effectand stimulates the secretion of gonadotropins byacting on the hypothalamus to increase its outputof GnRH.

C. Whereas low concentration of GnRH stimulatesthe release of LH and FSH, high concentration ofGnRH have the opposite effect and inhibits thesecretion of LH and FSH.

D. Whereas the lower concentration of prolactin inhibitsthe secretion of estrogen, higher concentration of

prolactin have opposite effect and stimulates therelease of estrogen.

DIRECTION (Q. 46 & 47) : Refer the given passage andanswer the following questions.Strength of an acid solution or a basic solution can bedetermined by knowing the hydrogen ion concentrationsin them, using a pH scale.

(i) Neutral solution has pH 7.(ii) Acidic solution has pH less than 7.(iii) Basic solution has pH more than 7.

The pH of a solution is inversely proportional to hydrogen(H +) ion concentration in it.

46. Five students, Ankit, Nitin, Deepika, Gunjan and Poojawere given test tubes having solutions with pH 1.2,13.5, 10.0, 7.4 and 2.2 respectively.The correct order of decreasing OH – ion concentrationin these solutions isA. Ankit > Pooja > Gunjan > Deepika > Nitin

B. Nitin > Gunjan > Ankit > Pooja > DeepikaC. Deepika > Gunjan > Pooja > Nitin > Ankit

D. Nitin > Deepika > Gunjan > Pooja > Ankit

47. Teacher told three students Renuka, Bhawna andSeema to test their saliva with pH paper before andafter having their lunch.Identify the correct observations from the following.

A. Bhawna observed that pH paper turned red andrecorded pH value of 2.3 – 2.5 before havinglunch.

B. Seema observed that pH paper turned yellow andrecorded pH value of 5.6 – 5.8 after having lunch.

C. Renuka observed that pH paper turned green andrecorded pH value of 7.4 – 7.9 before havinglunch.

D. Observations made by both Renuka and Seemawere correct.

48. Which of the diagrams shown in gure most closelyshows the variation in kinetic energy of the earth asit moves once around the sun in its elliptical orbit?

A.

B.

C.

D.


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49. The graph below shows change in air-pressure inthe lungs of a person during respiration.

Which of the following statements regarding thisare correct?(i) The regions between R to T and P to Q indicates

inhalation. (ii) The region between R to T indicates inhalation. (iii) At Q, the state of the rib cage is downward and

shape of the diaphragm is dome shaped. (iv) At Q, the state of the rib cage is upward and shape

of the diaphragm is attened. (v) The distance between P and T will decrease and

between H and Q will increase in a person doing

vigorous exercise. (vi) The distance between P and T will increase and between H and Q will decrease in a person doingvigorous exercise.

A. (i), (iv) and (vi)B. (ii), (iii) and (v)

C. (ii), (iii) and (vi) D. (i), (iii) and (v)

50. Refer the given figures and select the correctoption.

A. The part labelled W produces the male gameteequivalent to female gamete produced by the

part Q. B. The parts X, Y and Q produces egg cell, pollen

and ovum respectively. C. The function of part P is same as part Z while of

part S is same as part V. D. Development of respective embryos occur inside

parts X and R.



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ANSWER KEYS

14 th NSO

1. (A) 2. (B) 3. (B) 4. (C) 5. (A) 6. (C) 7. (C) 8. (C) 9. (B) 10. (A) 11. (B) 12. (C) 13. (B) 14. (C)

15. (A) 16. (C) 17. (A) 18. (B) 19. (D) 20. (A) 21. (B) 22. (C) 23. (A) 24. (C) 25. (B) 26. (C) 27. (D) 28. (B) 29. (D) 30. (C) 31. (B) 32. (D) 33. (D) 34. (C) 35. (D) 36. (B) 37. (B) 38. (A) 39. (B) 40. (B) 41. (B) 42. (C) 43. (B) 44. (D) 45. (D) 46. (D) 47. (C) 48. (D) 49. (C) 50. (C)

15 th NSO

1. (B) 2. (B) 3. (C) 4. (A) 5. (D) 6. (A) 7. (B) 8. (D) 9. (B) 10. (A) 11. (D) 12. (C) 13. (D) 14. (C) 15. (B) 16. (D) 17. (B) 18. (B) 19. (A) 20. (C) 21. (A) 22. (C) 23. (B) 24. (C) 25. (B) 26. (B) 27. (C) 28. (D) 29. (D) 30. (A) 31. (B) 32. (C) 33. (D) 34. (C) 35. (A) 36. (B) 37. (B) 38. (C) 39. (A) 40. (B) 41. (A) 42. (A) 43. (B) 44. (C) 45. (D) 46. (B) 47. (C) 48. (B) 49. (C) 50. (D)

16 th NSO

1. (A) 2. (C) 3. (D) 4. (C) 5. (A) 6. (C) 7. (C) 8. (C) 9. (C) 10. (D) 11. (A) 12. (C) 13. (A) 14. (A)

15. (A) 16. (B) 17. (B) 18. (B) 19. (B) 20. (C) 21. (B) 22. (C) 23. (B) 24. (A) 25. (D) 26. (D) 27. (C) 28. (D) 29. (C) 30. (C) 31. (B) 32. (C) 33. (C) 34. (B) 35. (C) 36. (A) 37. (D) 38. (A) 39. (D) 40. (C) 41. (D) 42. (C) 43. (C) 44. (D) 45. (B) 46. (D) 47. (D) 48. (D) 49. (B) 50. (D)

Documents

Class 10 Nso 3 Year e Book Level 2 14