Combustion and flame

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

Which one of the following is combustible?

• Iron nail

• Glass

• Stone pieces

• Paper

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

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

Tags

NGSS.HS-PS1-4

What is the main chemical component present in striking surface of a matchbox?

• Potassium chlorate

• Phosphorus

• Potassium

• Graphite