Chemistry quiz - online GK quiz

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1) Which was the first metal that was used by man?

a) Gold.
b) Bronze.
c) Copper.
d) Iron.

ANSWER : Copper

2) Which among the following consists of the nucleus of an atom?

a) Electrons and neutrons.
b) Electrons and protons.
c) Protons and neutrons.
d) All of these.

ANSWER : Protons and neutrons

3) Among the following which law states that the amount of gas dissolved in a liquid is proportional to its partial?

a) Henry’s law.
b) Raoult’s law.
c) Dalton’s law.
d) Gay Lussac’s law.

ANSWER : Henry’s law

4) The nucleus of a hydrogen atom consists of:

a) 1 proton only.
b) 1 proton + 2 neutrons.
c) 1 neutron only.
d) 1 electron only.

ANSWER : 1 proton only

5) Which among the following is the most abundant rare gas in the atmosphere?

a) He.
b) Ne.
c) Ar.
d) Xe.


6) What is the use of salt in the diet?

a) Make the taste of food better.
b) Produce in small amounts the hydrochloric acid required for the digestion of food.
c) Ease the process of cooking.
d) Increase the solubility of food particles in water.

ANSWER : Produce in small amounts the hydrochloric acid required for the digestion of food

7) The luster of a metal is due to:

a) Its high density.
b) Its high polishing.
c) Its chemical inertness.
d) Presence of free electrons.

ANSWER : Presence of free electrons

8) Which is the gas that is being used in the manufacture of vanaspati from vegetable oil?

a) Hydrogen.
b) Oxygen.
c) Nitrogen.
d) Carbon dioxide.

ANSWER : Hydrogen

9) Among the following which is the most electropositive elements?

a) Na.
b) Ca.
c) K.
d) Cs.


10) Which is the gas that is used for artificial ripening of green fruit?

a) Carbon dioxide.
b) Acetylene.
c) Ethylene.
d) Ethane.

ANSWER : Ethylene

11) The high reactivity of fluorine is due to:

a) Its high electro negativity.
b) Small size of fluorine atom.
c) Availability of d-orbitals.
d) Strong F – F bond.

ANSWER : Its high electro negativity

12) The iron ore magnetite consists of:

a) Fe2O3
b) Fe3OH4

c) FeCO3
d) 3Fe2O3, 3H2O


13) Which among the following is most electronegative element?

a) Sodium.
b) Bromine.
c) Fluorine.
d) Oxygen.

ANSWER : Fluorine

14) Which is the most commonly used bleaching agent?

a) Alcohol.
b) Carbon dioxide.
c) Chlorine.
d) Sodium chlorine.

ANSWER : Chlorine

15) Which is the method that cannot be used to remove permanent hardness of water?

a) Distillation.
b) Boiling.
c) Adding caustic soda.
d) Adding sodium carbonate.

ANSWER : Boiling

16) The number of moles of solute present in 1 kg of a solvent is called its………….

a) Molality.
b) Normality.
c) Formality.
d) Molarity.

ANSWER : Molality

17) Using which of the metallurgical process a metal is obtained in a fused state?

a) Roasting.
b) Froth flotation.
c) Calcinations.
d) Smelting.

ANSWER : Smelting

18) Among the following the molecules of which gas have highest speed?

a) CH4 at 300K.
b) H2 at 73°C.
c) N2 at 1027°C.
d) O2 at 0°C.

ANSWER : H2 at 73°C.

19) The heat required to raise the temperature of body by 1 K is called:

a) Specific heat.
b) Thermal capacity.
c) Water equivalent.
d) None of these.

ANSWER : Thermal capacity

20) The octane number of zero is assigned to:

a) 2-methyl octane.
b) n-heptane.
c) iso-octane.
d) 3-methyl octane.

ANSWER : n-heptane

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It realy work to enhance knowledge .....Thanks

Divya Khuperkar 03-2-2017 12:38 PM


if explanation is given then it is quite easy to grasp the answer

rameshwar ram saharan 02-20-2016 01:35 AM

improves our gk

ye ek badhiya tarika hai gk ko ache se gain karna many many thanks

ashok kumar 11-1-2014 01:26 AM


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