Flame and Combustion

Burning of charcoal in a closed room will produce

• Carbon dioxide

• Nitrogen dioxide

• Carbon monoxide

• Sulphur dioxide

Which one of the following is combustible?

• Iron nail

• Glass

• Stone pieces

• Paper

Which is the hottest part in the candle flame?

• Yellow

• Wax part

• Black

• Blue

Combustion is a reaction in which a substance reacts with

• hydrogen

• Nitrogen

• Oxygen

• Chlorine

Water cannot be used as a fire extinguisher to put out

• Burning coal

• Electrical fires

• Burning wood

• Forest fires

Water is not used to control fires involving electrical appliances.

• False
• True

Name the most common fuel used in homes.

• Petrol

• Kerosene

• Liquified Petroleum Gas

• Wax

Does magnesium produce heat and light during its combustion?

• True

• False

The substance which ________ during burning give flames,

• Heats

• Vaporise

• Boils

• Melts

Coal burns with ______

• Flame

• Do not burn

• Only glow

• Flame and burn