MEDIUM
Earn 100

Give supporting arguments for both the statements (1) fire is useful (2) fire is harmful.

Important Questions on Combustion and Flame

EASY
Science>Chemistry>Combustion and Flame>Combustion
State any two conditions required for combustion.
MEDIUM
Science>Chemistry>Combustion and Flame>Combustion

A metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle.

Name the gas that extinguishes the burning candle.

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