Class 8

Combustion and Flame question bank (Science)

Practice 72 free Class 8 Science - Combustion and Flame questions with answers and step-by-step solutions.

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Q1.

The lowest temperature at which a substance catches fire is known as its:


(A)
Boiling point
(B)
Ignition temperature
(C)
Melting point
(D)
Critical temperature
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Q2.

Which of the following fuels has the highest calorific value ($1,50,000\text{ kJ/kg}$)?


(A)
LPG
(B)
Petrol
(C)
Methane (CNG)
(D)
Hydrogen gas
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