Some words (underlined) in the following sentence is jumbled up. Write it in the correct form.

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

Important Questions on Combustion and Flame

EASY

8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>VERY SHORT ANSWER QUESTIONS>Q 18

Two glass jars A and B are filled with carbon dioxide and oxygen gases respectively. In each jar, a lighted candle is placed simultaneously. In which jar will the candle remain lighted for a longer time and why?

MEDIUM

8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>VERY SHORT ANSWER QUESTIONS>Q 19

Anu wants to boil water quickly in a test tube. On observing the different zones of the flame, she is not able to decide which zone of the flame will be best for boiling water quickly. Help her in this activity.

MEDIUM

8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>VERY SHORT ANSWER QUESTIONS>Q 20

Why is the use of diesel and petrol as fuels in automobiles being replaced by Compressed Natural Gas (CNG) in big cities?

MEDIUM

8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 21

Boojho wants to separate the following materials as combustible and non-combustible. Can you help him?
Charcoal, chalk, stone, iron rod, copper coin, straw, cardboard, glass, paper, candle, wood.

EASY

8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 22

Air is necessary for combustion.

EASY

8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 6 - Combustion and Flame>SHORT ANSWER QUESTIONS>Q 22

Magnesium is a non-combustible metal.

MEDIUM

8th CBSE