The formula of potassium permanganate is

… is written on petrol tankers,

… is used in matchsticks.

… is used in surface of match-stick,

The liquid fuel used in homes is

Burning of wood and coal causes severe … pollution.

The type of combustion in which material suddenly burns into flames without the application of any external agent is called …

Burning of a matchstick is an example of … combustion.

In which situations we are misusing the fuel resources while cooking in our daily life?

Units of calorific value is

Which causes less pollution? Among the fuels that we use in our daily life.

Which one among the following is considered as the cleanest fuel?

Clothes catch fire, the best way to extinguish the fire is to

In villages, people use wood as fuel because …

Which one of the following has the highest calorific value?