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SCIENCE SA II MOCK TEST (2010 - 11) - 3

TEST ID SCIX03

Time : 3 hours Maximum marks: 80

Please read the instructions carefully. INSTRUCTIONS

General Instructions : (i) The question paper comprises of two sections A and B. You have

to attempt both the sections.(ii) All questions are compulsory. (iii) There is no overall choice. However, internal choice has been provided

in all the three questions of five marks category. Only one option insuch question into be attempted.

(iv) All questions of section A and all questions of section B are to beattempted separately.

(v) Question number 1 to 4 in section A are one mark questions.They are to be answered in one word or one sentence.

(vi) Question numbers 5 to 13 are two mark questions, to be answered in about 30 words each.

(vii) Question numbers 14 to 22 are three mark questions, to be answered in about 50 words each.

(viii) Question numbers 23 to 25 are five mark questions, to be answered in about 70 words each.

(ix) Question numbers 26 to 41 in section B are multiple choice questions based on practical skills. Each question is a one marks question.You are to select one most appropriate response out of the fourprovided to you.

Class - X

(THEORY)

Q): 1 What is the far point and near point of the human eye with normal vision?

Q): 2 What are metalloids ?

Q): 3 What is bad ozone?

Q): 4 Why is sun considered to be an ultimate source of energy?

Q): 5 Why is a normal eye not able to see clearly the objects placed closer than 25cm?

Q): 6 Draw a labelled diagram to show:

(i) Centre of curvature

(ii) Principal axis

(ii) Principal focus and

(iv) Pole of a concave mirror

Q): 7 A doctor has prescribed a corrective lens of power +1 5D. Find the focal length of the lens- Is

the prescribed lens converging or diverging?

Q): 8 What is reproduction?Mention the importance of DNA copying in reproduction.

Q): 9 Draw the electronic dot structure of:

(a)Methyl chloride

(b)Ethanoic acid.

Q): 10 What is an isotope ? Why it became difficult to adjust isotopes in the mendeleev's table?

Q): 11 List any two differences between pollination and fertilization.

Q): 12 (i)Why are coal and petroleum called fossil fuels? (ii) Name the two elements which are present

both in CNG and petroleum.

Q): 13 For the conservation of forest who can be a stakeholder?

Q): 14 We wish to obtain an erect image of an object, using a concave mirror of focal length 15cm. What

should be the range of distance of the object from the mirror? What is the nature of the image? Is the

image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

Section - A


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(1)

(1)

(1)

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Q): 16 Explain total internal reflection.

Q): 17 What is an ester? How is it prepared ? Write the chemical reaction involved. Write a property and

few uses of an ester.

Q): 18 Write the triads as formed by Dobereiner.

Q): 15 You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use

the information given in Table.

Q): 19 What are the different methods of contraceptions?

Q): 20 Why evolution should not be equated with progress?

Q): 21 What is genetic drift?

Q): 22 What is Natural Selection?

Q): 23 Explain the different types of images formed by a concave mirror. Also give the characteristics of

the image in each case.

(a) What is dispersion of white light? What is the cause of such dispersion? Draw a diagram to show the dispersion of white light by a glass prism

(b) A glass prism is able to produce a spectrum when white light passes through it but a glass slab does not produce any spectrum. Explain why it is so.

OR

Q): 24 Write the scientific names of different functional groups of organic compounds and give two

examples of each.

Q): 25 (i)In Human body what is the function of Seminal Vesicles and Prostrate Glands.

(ii) List two functions performed by testes in human beings. (iii)Write the function of Vas

Deferens.

Write the valencies of first twenty elements e.g., H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K and Ca.

OR

ORWhat are the vavious artificial methods of vegetative propagation in plants.


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(3)

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(3)

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Section - B26) What will happen if acetic acid is poured into water?

A) Colloidal solution will be formed B) Turbidity will be formed.

C) Heterogeneous mixture will beformed D) Homogeneous solution will be formed

27) The given slides A and B were identified by four students I,II, III and IV as stated below

Slide A Slide B

I Binary Fission in Amoeba Daughter cells of Amoeba

II Budding in Yeast Buds of Yeast

III Binary Fission in Amoeba Buds of Yeast

IV Budding in Yeast Daughter cells in Amoeba Of the above mentioned identifications of slides A and B, which one is correct ?

A) I B) II

C) III D) IV

28) A stick partially immersed in water appears broken due to

A) refraction B) dispersion

C) reflection D) total internal reflection

29) A slide showing several amoebae was given to a student and was asked to focus the Amoeba

undergoing binary fission. What will the student look for to correctly focus on a dividingAmoeba?

A)A rounded Amoeba with roundednucleus.

B)An Amoeba covered by a cyst and manynuclei.

C)An Amoeba with elongated nucleus anda constriction in the middle.

D)An Amoeba with many pseudopodia and asmall nucleus.

30) In an experiment to determine the focal length of a convex lens, a student obtained theimage of a distant window on the screen. To determine the focal length of the lens, she shouldmeasure the distance between the

A) screen and the window only. B) lens and the window only.

C) lens and the screen only. D) screen and the lens and alsobetween the screen and the window.

31) From the following diagrams,select the correct ones showing stages of binary fission inAmoeba and budding in Yeast in their proper sequence.

A) VIII,VII,IV and III,II,VI B) III,IV,VII and II,VIII,VI

C) VII,IV,I and III,VIII,VI D) V,I,IV, and II,III,VI


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32) An iron strip was left dipped in aqueous Zinc sulphate, Copper Sulphate, Iron Sulphateand Aluminium Sulphate solutions, as shown below by deepak in his school laboratory. Hewould observe the deposition of metal on iron in beakers.

(I)

(II)

(III)

(IV)

A) I and II B) II

C) III D) III and IV

33) The field of view is maximum for

A) concave mirror B) convex mirror

C) plane mirror D) parabolic mirror

34) While performing the experiment to trace the path of a ray of light passing through arectangular glass slab, four students labelled their ray diagrams in the manners shown below.The correct labelling has been done by student.

A) I B) II

C) III D) IV


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35 ) A student soaked 5 raisins each of equal weight in three beakers A, B and C eachcontaining 100 ml of distilled water and left them at room temperature. After 10 minutes he

reomoved the raisins from beaker A, after 20 minutes from beaker B and after one hour from

beaker C. He calculated the percentage absorption of water in each case. If PA,PB and PC denote

percent absorption, then which of the following is correct?

A)PA > PB < PC

B)PA < PB < PC

C)PA = PB = PC

D)PA < PB > PC

36) Name the gas evolved in the present setup.

A)CO

B)CH4

C)H2

D)CO3

37 ) A sharp image of a distant object is obtained on a screen by using a convex lens. In orderto determine the focal length of the lens, you need to measure the distance between the

A) lens and the screen. B) lens and the object.

C) lens and the screen and also object and the screen.

D) object and the screen.

38 ) What will you observe when light green ferrous sulphate solution is added to a testtube containing copper turnings?

A) The light green colour of ferroussulphate remains unchanged

B) The solution becomes colourless

C) Iron gets deposited on the surface ofcopper turnings.

D) The colour of solution changes toblue

39) Element 'X' forms a chloride with the formula XCl2, which is a solid with high meltingpoint.In which group X could most likely be of the Periodic Table as:

A) Si B) Al

C) Mg D) Na

40 ) Which one out of the following diagrams correctly depicts an Amoeba undergoingbinary fission?

A) II B) IV

C) I D) III


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41 ) While performing an experiment to determine the percentage of water absorbed by

raisins, the following data was obtainedMass of water taken in the beaker= 50g Mass of raisins before soaking them in water=5 gMass of raisins after soaking in water for 2 hours=8gThe percentage of water absorbed by raisins would be

A)(83)g

8 g100

B)(85)g

8g100

C)(85)g

3 g100

D)(85)g

5 g100


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