set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of these consists carbon?

a) Iron

b) Lignite

c) Tin

d) Silver

Question : 2

Which has is filled at low pressure in a tube light?

a) Neon and Mercury vapour

b) Nitrogen and Neon

c) Argon and Neon

d) Only Argon

Question : 3

Which one of the following nonmetals is not a poor conductor of electricity?

a) Phosphorus

b) Sulphur

c) Selenium

d) Bromine

Question : 4

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 : 5

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 : 6

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)