General Science Questions

1)     Which non-metal remains liquid at room temperature ?

Ans. Bromine.

2)     What is used to make pencil ?

Ans. Graphite.

3)     Which metal forms amalgam with other metals ?

Ans. Mercury.

4)     What is the chemical formula for water ?

Ans. H₂O.

5)     Which gas is used to fill in electric bulb ?

Ans. Nitrogen

6)     Washing Soda is the common name of which chemical substance ?

Ans. Sodium Carbonate.

7)     Which gas is known as Green House Gas ?

Ans. Water Vapours, Carbon dioxide and methane.

8)     Which is the hardest substance available on earth ?

Ans. Diamond.

9)     By which property, a substance absorb moisture from air on exposure ?

Ans. Deliquescence.

10) What is the average salinity of sea water ?

Ans. 3.5 %.

11) Galvanised iron sheet have a coating of which metal ?

Ans. Zinc.

12) Which element is common to all acids ?

Ans. Hydrogen.

13) What is coated in non-stick utensils ?

Ans. Teflon.