set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Which among the following elements is abundant on the lunar surface and holds the potential to put an end to the energy crisis of the earth?

a) Helium-II

b) Helium-III

c) Helium-I

d) Helium-IV

Question : 2

German silver is a mixture of –

a) copper, nickel and zinc

b) copper and zinc

c) copper and tin

d) aluminium, copper and traces of Mg and Mn.

Question : 3

Match List-I with List-II:

a) 2 3 4 1

b) 3 2 4 1

c) 1 3 2 4

d) 4 3 1 2

Question : 4

Statement I:
Soaps do not form lather with water containing salts of calcium and magnesium.
Statement II:
Calcium and magnesium salts of long chain fatty acids are insoluble in water.

a) Both the statements are individually true but Statement II is not the correct explanation of Statement I.

b) Statement I is true, but Statement II is false.

c) Both the statements are individually true and Statement II is the correct explanation of Statement I.

d) Statement I is false, but Statement II is true.

Question : 5

Aluminium is used in thermite welding because -

a) aluminium is a strong oxidising agent

b) aluminium is a light metal

c) aluminium has more affinity for oxygen

d) aluminium is a reactive metal

Question : 6

Mercury is basically used in thermometer devices because its especiality is

a) High liquidity

b) High circulation power

c) High density

d) High specific heat