Question

III. Tick () the correct and cross (X) the wrong
on
statement:
1. Substances burn in air and form carbon dioxide.
2. Burnt fuel should always leave some residue.
3. Water gas is a mixture of carbon monoxide and
nitrogen.
4. Calorific value of coke is more than that of coal.
5. Natural gas mainly contains methane and traces of
ethane and propane.
6. Wood burns with a flame.
7. There is a blue colour zone at the base of the wick
8. Presence of a combustible substance is not essential
for a substance to burn.
9. Red phosphorus can be stored in a bottle.
10. Coal
gas is obtained from destructive distillation of
coal.​

Answer 1

Answer:

4

Explanation:

coke contain more charcoal