MEDIUM
8th CBSE
IMPORTANT
Earn 100

Define ignition temperature of a substance.

Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 2
Which of the two has a lower ignition temperature: petrol or kerosene?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 3
Name the most common fire extinguisher? (Wet chemical / Water)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 4
Which is the best fire extinguisher for fires involving electrical equipment and inflammable materials like petrol?
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 5
Name one substance which undergoes spontaneous combustion or burns in air at room temperature. (Wood / White phosphorous)
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 6
Name the unit in which the calorific value of a fuel is expressed.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 7
Which of the following fuels has the lowest calorific value? (Diesel, methane, CNG, coal, petrol)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 8
Which of the following fuels has the highest calorific value?
kerosene, wood, hydrogen, cow-dung cakes, LPG.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 9
Name the term which is used to express the efficiency of a fuel.(Calorific value/specific value)