MEDIUM
8th CBSE
IMPORTANT
Earn 100

Substances that catch fire easily in the presence of oxygen are called flammable substances.

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Important Questions on Combustion, Flame and Fuels

MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q C
The flame of a Bunsen burner is blue when the air hole is clogged, and it does not get a sufficient supply of oxygen.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q C
Temperature at which a substance catches fires and starts burning is called ignition temperature.
HARD
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q C
LPG is a liquid fuel.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q C
Carbon monoxide has lesser affinity to haemoglobin than oxygen.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q D
What are the three conditions necessary for combustion to take place?
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q D
State a difference between complete and incomplete combustion.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q D
Does the burning of coal produce flame as the burning of wood does?
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q D
Why is carbon dioxide used in fire extinguishers?