EASY
Earn 100

The process of burning in the presence of oxygen is called .

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Important Questions on Chemical Changes and Reactions

EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
State any two conditions required for combustion.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
What are fuels? Name any two common fuels.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Nitrogen supports combustion.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain. 
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Blisters and ulcers occur in the case of _____.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after some time.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
List conditions under which combustion can take place.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Why do you have to use paper or kerosene oil to start fire in wood or coal?
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
If you see a person whose clothes are on fire, how will you extinguish the fire? Give reason for your answer.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Why does a goldsmith blow air into the kerosene lamp flame with a blow-pipe?
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
What are the conditions necessary for combustion to take place?
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
_____ is the technique to put out a fire on our clothes. (Give proper indentation) [Stop, drop and roll/ Run and jump in water]
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Can the process of rusting be called combustion? Give reason for your answer.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
The temperature of the substance should be lowered below the _____ temperature. (room / kindling)
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Name two substances having low ignition temperatures and two having high ignition temperatures.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
What are non-combustible Substances? Name three non-combustible substances.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
What are combustible substances? Name three combustible substances.
EASY
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Which one is a supporter of combustion?
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
Can you burn a piece of wood by burning a lighted matchstick near it? Explain.
HARD
Science>Chemistry>Chemical Changes and Reactions>Change of Energy during Chemical Reaction
How will you show that air is necessary for combustion?