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.

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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Q2.

In the chapter 'Combustion and Flame', which scientific principle governs 'Conditions Necessary for Combustion (Fuel, Oxygen, Ignition Temp)'?


(A)
Superstition and myth
(B)
Empirical evidence, conservation laws, and repeatable experimental observations in Conditions Necessary for Combustion (Fuel, Oxygen, Ignition Temp)
(C)
Aristotelian unverified claims
(D)
Random molecular movement without thermodynamics
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