Combustion of Fuels

Q. During the combustion of coal, it reacts with oxygen to produce carbon dioxide.

1. True
2. False

Q.

What are the products produced due to the combustion of coal? [2 MARKS]

Q. Combustion of fuel is a:

1. physical change
2. chemical change
3. reversible change
4. irreversible change

Q. Which of the following can be used to extinguish a fire caused by petrol?
1. Water
2. Sand
3. Carbon dioxide

1. 1 and 2
2. 1, 2 and 3
3. 2 and 3
4. 1 and 3

Q. Assertion :Coal is one of the fuel used to cook food. Reason: Coal can be used to fire a stove or an oven, but only if the food is in a completely separate environment from the fire.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

1. Carbon monoxide

2. Sulphur dioxide

3. Carbon dioxide

4. Nitrogen dioxide

Q.

Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

1. Sulphur dioxide

2. Carbon dioxide

3. Nitrogen dioxide

4. Carbon monoxide