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 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
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

Middle zone is the hottest zone of a flame.

EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 29
 Cracker on ignition produces sound. Why?
MEDIUM
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 30
What do you understand by fuel efficiency?
EASY
8th CBSE
IMPORTANT
NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>LONG ANSWER QUESTIONS>Q 31
 You are provided with three watch glasses containing milk, petrol and mustard oil, respectively. Suppose you bring a burning candle near these materials one by one, which material(s) will catch fire instantly and why?