Combustion and flame

Burning of charcoal in a closed room will produce

• Carbon dioxide

• Nitrogen dioxide

• Carbon monoxide

• Sulphur dioxide

Tags

NGSS.MS-PS1-5

The substances which have very low ignition temperature will

• Catch fire easily

• Will not catch fire

• Catch fire after some time

• None of these

Ignition temperature is

• Lowest temperature at which a substance catches fire

• Highest temperature at which a substance catches fire

• Any temperature

• 100⁰ C

Combustion is a

• Natural process

• Chemical process

• Physical process

• None of these processes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When a magnesium ribbon is burnt, it produces

• Magnesium hydroxide

• Magnesium oxide

• Magnesium chloride

• Magnesium sulphate

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

Fuel may be

• Solid

• Liquid

• Gas

• All of the three

Combustion is a reaction in which a substance reacts with

• hydrogen

• Nitrogen

• Oxygen

• Chlorine

Tags

NGSS.MS-PS1-2

CNG and LPG are the examples of

• Solid fuels

• Liquid fuels

• Gaseous fuels

• They are not fuels