Chemistry :

1. Which is the second most abundant metal in the earth’s crust ?

Ans : Iron

2. Air is a/an …………….

Ans : mixture

3. The filament of the electricity bulb is made of …………….

Ans : tungsten

4. Which is the lightest Gas ?

Ans : Hydrogen

5. Carbon, diamond and graphite are together called ………………

Ans : allotropes

6. The most malleable metal is ………………….

Ans : gold

7. Which metal was first discovered by man ?

Ans : Copper

8. Which is used in beauty parlous for hair setting ?

Ans : Sulphur

9. Gobar gas contains mainly ………………….

Ans : methane

10. Galvanized iron sheets have a coating of ………………….

Ans :zinc