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NTSE CHEMISTRY SAMPLE PAPER

1. The mass of sodium in 11.7 g of sodium chloride is

(a) 2.3 g (b) 4.6 g

(c) 6.9 g (d) 7.1 g

2. 2223 COOHCaClHCl2CaCO.The mass of calcium chloride formed when 2.5 g

calcium carbonate are dissolved in excess of hydrochloric acid is

(a) 1.39 g (b) 2.78 g

(c) 5.18 (d) 17.8 g

3. The value of e/m of an electron was measured by

(a) Millikan (b) J.J. Thomson

(c) Dalton (d) Rutherford

4. The diagram given below represents an atom of

(a) chlorine (b) magnesium

(c) calcium (d) helium

5. Which of the following has zero electron affinity?

(a) Radon (b) Nitrogen

(c) Oxygen (d) Radium

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6. The correct order of second IE of C, N, O and F are in the order

(a) F > O > N > C (b) C > N > O > F

(c) O > N > F > C (d) O > F > N > C

7. When of the following is a non-polar molecule?

(a) is covalent only

(b) is electrovalent

(c) consists of three covalent nitrogen hydrogen bonds and an electrovalent bond

between the ammonia molecule and the chlorine atom

(d) consist of four covalent nitrogen hydrogen bonds and one electrovalent bond

between the ammonium ion and chloride ion

8. Which of the following molecules have a pyramidal structure?

(a) PCl5 (b) NH3

(c) BF3 (d) SiF4

9. In the reaction 2FeCl2

+ Cl2

2FeCl3

chlorine may be regarded as

(a) an oxidizing agent (b) a reducing agent

(c) a catalyst (d) providing an inert medium

10. In the following equations

OHCONaCl2xHClCONa 2232 the value of x is

(a) 1 (b) 2

(c) 3 (d) 4

11. Which of the following will have the highest rate of reaction?

(a) Weathering of rocks

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(b) Neutralisation of HCl with sodium hydroxide

(c) Rusting of iron

(d) None of these

12. For which of the following reaction are the numerical values of pK and cK the same?

(a) 2NOCl(g) )g(Cl)g(NO2 2

(b) N2 (g) + 3H2 (g) )g(NH2 3

(c) H2 (g) + Cl2 (g) )g(HCl2

(d) H2 (g) + I2 (s) 2HI (g)

13. Copper does not react with dilute HCl but reacts in the presence of air or oxygen

because

(a) copper is ranked lower than hydrogen in the activity series

(b) HCl is not an oxidizing agent

(c) air or oxygen oxidises the the copper metal to copper 2 ion

(d) all of these

14. Sulpher on reaction with concentrated sulphuric acid forms sulpher dioxide. According to

this reaction, sulphuric acid is behaving as

(a) drying agent (b) oxidizing agent

(c) dehydrating agent (d) none of these

15. The average composition of ordinary glass is

(a) 22 SiO6.CaO.ONa (b) 22 SiO3.CaO2.ONa

(c) 3222 OCr.SiO6.CaO.ONa (d) 22 SiO6.PbO.CaO.ONa

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16. The windscreen of cars, aeroplanes, etc, is made up of

(a) hard glass (b) safety glass

(c) lead glass (d) soda glass

17. A hydrocarbon is

(a) a compound containing carbon, hydrogen and oxygen

(b) is sodium hydrogen carbonate

(c) a compound containing carbon and hydrogen and oxygen

(d) a derivative of benzene

18. Theformula of ethyne is

(a) 22HC (b) 66HC

(c) 42HC (d) 62HC

19.alkaline

KMnO4

acid

H+

X YCH3COCH3propanone

The compound Y is

(a) propanoic acid (b) propanal

(c) ethanoic acid (d) propanol 1

20. Which of the following is NOT an addition polymer?

(a) Neoprene (b) Teflon

(c) Polyviny chloride (d) Polyamide

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NTSE CHEMISTRY SAMPLE PAPER

1. (c)

2. (b)

3. (a)

4. (b)

5. (a)

6. (d)

7. (d)

8. (b)

9. (a)

10. (b)

11. (b)

12. (c)

13. (d)

14. (b)

15. (a)

16. (b)

17. (c)

18. (d)

19. (c)

20. (d)