set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Statement (A):
Galvanized iron does not rust.
Statement (R):
Zinc has the efficiency of oxidation.

a) (A) is false, but (R) is true

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

Question : 2

Which pair of following is of Copper alloys?

a) None of the above

b) Brass and Bronze

c) Brass and invar

d) Bronze and Nichrome

Question : 3

Discharge of Nitrogen causes

a) Increase in the amount of Nitrogen in lithosphere

b) The amount of Nitrogen in lithosphere and in atmosphere unchanged

c) Increase in the amount of atmospheric nitrogen

d) Destruction of nitrates bacteria

Question : 4

The process used for transforming salty water into pure water is called

a) Reverse osmosis

b) Electric separation

c) Deliquescence

d) Efflorescence

Question : 5

To make the steel hard requires increase in

a) The quantity of Chromium

b) The quantity of Silicon

c) The quantity of Carbon

d) The quantity of Manganese

Question : 6

Easily soluble in water

a) Nitrogen

b) Ammonia

c) Carbon

d) Iodine