Chemistry MCQS

1.       Most commonly used bleaching agent is .

Ans. chlorine

2.       The chief constituent of gobar gas is.

Ans. methane

3.       ………….is the hardest mineral.

Ans. Diamond

4.       What is laughing gas?

Ans. Nitrous Oxide

5.       The element common to all acids is…….

Ans. Hydrogen

6.       Diamond is an allotropic form of…….

Ans. Carbon

7.       Which gas is commonly used in balloons?

Ans. Helium

8.       Oldest known element?

Ans. Copper

9.       Which shape of carbon is used in lead pencils?

Ans. Graphite

10.   Artificial silk is called?

Ans. rayon

11.   …………….is used in decoration lighting.

Ans. Neon gas