EASY
8th CBSE
IMPORTANT
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The lowest temperature at which a substance catches fire is called its temperature.

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Important Questions on Combustion and Flame

EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 26

Ignition temperature of _____(petrol / iron) is lower than that of wood.

EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 26

The amount of heat energy produced on complete combustion of 1kg of a fuel is called its _____.

EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 27
People usually keep Angethi/burning coal in their closed rooms during winter season. Why is it advised to keep the door open?
EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 28
A physical process in which a substance reacts with oxygen to give off heat is called combustion.
EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 28
Water is the best extinguisher for fires involving electrical equipment.
EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 28

Alcohol, CNG and LPG are inflammable substances.

MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 28

Increased concentration of nitrogen in air is believed to cause global warming.

EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 28

Greater the calorific value, better is the fuel.