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1) Among the following which element is common to all acids?

a) Hydrogen.
b) Carbon.
c) Oxygen.
d) Sulphur.

ANSWER : Hydrogen

2) Non-stick cooking utensils are coated with:

a) Black paint.
b) Polystyrene.
c) PVC.
d) Teflon.

ANSWER : Teflon

3) Carbon, diamond and graphite are together called:

a) Isotopes.
b) Isomers.
c) Isomorphs.
d) Allotropes.

ANSWER : Allotropes

4) What does soda water contains?

a) Carbonic acid.
b) Carbon dioxide.
c) Nitrous acid.
d) Sulphuric acid.

ANSWER : Carbon dioxide

5) To remove permanent hardness of water what should be added?

a) Alum.
b) Lime.
c) Potassium permanganate.
d) Sodium carbonate.

ANSWER : Sodium carbonate

6) Which among the following is most important ore of aluminium?

a) Galena.
b) Calamine.
c) Bauxite.
d) Calcite.

ANSWER : Bauxite

7) From which mineral is radium obtained?

a) Limestone.
b) Haematite.
c) Pitchblende.
d) Rutile.

ANSWER : Pitchblende

8) Which among the following is in liquid form at room temperature?

a) Lithium.
b) Sodium.
c) Cerium.
d) Francium.

ANSWER : Francium

9) Which among the following was to be discovered first in the chromospheres of the sun?

a) Helium.
b) Neon.
c) Xenon.
d) Krypton.

ANSWER : Helium

10) Which among the following is known as laughing gas?

a) Carbon monoxide.
b) Nitrous oxide.
c) Sulphur dioxide.
d) Hydrogen peroxide.

ANSWER : Nitrous oxide

11) Actinides are the elements with atomic numbers from:

a) 97 to 104.
b) 101 to 115.
c) 36 to 43.
d) 89 to 103.

ANSWER : 89 to 103

12) Diamond is an allotropic form of:

a) Silicon.
b) Sulphur.
c) Carbon.
d) Germanium.

ANSWER : Carbon

13) In fireworks, the green flame is produced because of:

a) Sodium.
b) Barium.
c) Mercury.
d) Potassium.

ANSWER : Barium

14) LPG consists mainly of:

a) Methane, ethane and hexane.
b) Methane, hexane and nonane.
c) Ethane, hexane and nonane.
d) Methane, butane and propane.

ANSWER : Methane, butane and propane

15) Which is the metal that pollutes the air of a big city?

a) Lead.
b) Copper.
c) Chromium.
d) Cadmium.

ANSWER : Lead

16) Bell metal is an alloy of:

a) Nickel and copper.
b) Brass and nickel.
c) Zinc and copper.
d) Tin and copper.

ANSWER : Tin and copper

17) Balloons are filled with:

a) Oxygen.
b) Helium.
c) Argon.
d) Nitrogen.

ANSWER : Helium

18) Which among the following is the lightest metal?

a) Lead.
b) Silver.
c) Lithium.
d) Mercury.

ANSWER : Lithium

19) What are the main constituents of pearls?

a) Calcium carbonate and magnesium carbonate.
b) Aragonite and conchiolin.
c) Ammonium sulphate and sodium carbonate.
d) Calcium oxide and ammonium chloride.

ANSWER : Calcium carbonate and magnesium carbonate

20) Which among the following metals remain in liquid for under normal conditions?

a) Uranium.
b) Mercury.
c) Zinc.
d) Radium.

ANSWER : Mercury

General Knowledge: General Science questions and answers