Which zone of candle flame is luminous and why?

Important Questions on Combustion and Flame

HARD

8th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 6 - Combustion and Flame>Exercise>Q 4

Nitika is reading a book in her balcony. Suddenly, she observes fire at her neighbour's house in their kitchen. She immediately rushes and informs the old lady, who is the only one there. Finding the overturned kerosene can, that caused the fire, Nitika immediately opens the fire extinguisher and puts out the fire.

Why do you think Nitika used fire extinguisher and not water?

HARD

8th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 6 - Combustion and Flame>Exercise>Q 4

Nitika is reading a book in her balcony. Suddenly, she observes fire at her neighbour's house in their kitchen. She immediately rushes and informs the old lady, who is the only one there. Finding the overturned kerosene can, that caused the fire, Nitika immediately opens the fire extinguisher and puts out the fire.

Which values are shown by Nitika in this act?

MEDIUM

8th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 6 - Combustion and Flame>Exercise>Q 1

Why is water not used for extinguishing fire by petrol and fire in electrical appliances ? Explain in detail?

HARD

8th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 6 - Combustion and Flame>Exercise>Q 2

Distinguish between the three zones of a candle flame.

MEDIUM