Amount of CO2 Released in Combustion

Q. A person was sleeping in a closed room with coal burning in a container. Next day the person was found dead. Choose the reason(s) which could be responsible for his death.

1. Inadequate oxygen supply in body.
2. Excess of oxygen supply in room.
3. Excess of carbon monoxide in room.
4. Excess of nitrogen dioxide in body.

Q. Hydrocarbons burn to produce

1. ${\text{CO}}_2$ and ${\text{H}}_2\text{O}$
2. ${\text{CO}}_2$ and ${\text{O}}_2$
3. ${\text{CO}}_2$ and ${\text{H}}_2$
4. ${\text{CO}}_2$

Q. The number of molecules of carbon dioxide produced when two molecules of butane undergo combustion is ____________.

1. five
2. six
3. seven
4. eight

Q. Burning of petrochemicals directly causes air pollution by

1. Release of carbon di-oxide
2. Release of carbon monoxide
3. Increasing atmospheric temperature
4. Increasing the atmospheric pressure