Chemistry MCQ Question Answer Paper Set 1

1)The father of modern chemistry is—

a) Priestley

b) Lavoisier

c) Dalton

d) Mendeleeff


2) Which one is not metal—

a) sulpher

b) Suger

c) Nitrogen

d) all

ans: d

3) Which one is the pure element—

a) glass

b) cement

c) sodium

d) none of these

ans: c

4) An element X forms an oxide XO3 What is the valency of X?

a) 1

b) 2

c) 3

d) 6

ans: d

5) Which of the following has highest frequency?

a) Cosmic rays

b) x— rays

c) Radio waves

d) Micro waves

ans: a

6) In isotopes the number of neutrons are—

a) same

b) different

c) both

d) none

ans: b

7) Which one of the following is not radioactive?

a) Astanine

b) Francium

c) Tritium

d) Zirconium

ans: d

8)The heaviest naturally occurring elements is—

a) Thorium

b) Uranium

c) Mercury

d) Polonium

ans: b

9)The maximum number of hydrogen bonds is a H2O molecule is—

a) 1

b) 2

c) 3

d) 4

ans: d

10) pH value of acidic solution is—

a) <7

b) >7

c) 7

d) None

ans: a

11)Red litmus paper is changed into blue in solution of—

a) Base

b) Acid

c) Salt

d) None

ans: a

12)Which of the following gases will have the highest rate of diffusion—

a) O2

b) CO2

c) NH3

d) N2

ans: c

13)The density of the gas is equal to—

a) np

b) MP/RT


d) M/V

ans: b

14)Which of the following catalyst is sensitive to tempreture changes—

a) Fe

b) Pt

c) Ni

d) Enzyme

ans: d

15) Which has maximum calorific value—

a) Fat

b) Protein

c) Carbohydrate

d) Amino acid

ans: a

16)The ratio of y for inert gases is—

a) 1.33

b) 1.66

c) 2.13

d)  1.99

ans: b

17) Which of the following among alkali metals is most reactive?

a) Na

b) K

c) Rb

d) Cs

ans: d

18)The law of relative lowering of vapour pressure was given by—

a) Vant Hoff

b) Ostwald

c) Lewis

d) Raoult


19)Which of the following metals is not attacked by the environment—

a) Gold

b) Copper

c) Silver

d) Iron

ans: a

20) Out of the following which one is an example of emulsion —

a) Soap solution

b) Milk

c) Blood

d) Air

ans: b

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