set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The halogen being used as analgesic is

a) Bromine

b) Iodine

c) Chlorine

d) Fluorine

Question : 2

Which of these consists carbon?

a) Iron

b) Lignite

c) Tin

d) Silver

Question : 3

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 : 4

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 : 5

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 : 6

What is the approximate percentage of Nitrogen present in the atmosphere?

a) 18-20%

b) 40-42%

c) 10-11%

d) 78-79%