Combustion and Flame-Combustion [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 4 of 4
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Question 1
Question MCQ▾
The substances with low ignition temperature are called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Inflammable substance | |
b. | Fuel | |
c. | Flammable substance | |
d. | None of the above |
Question 2
Question MCQ▾
Combustible substance:
Choices
Choice (4) | Response | |
---|---|---|
a. | It may be in the form of solid, liquid or gas | |
b. | Is the fuel which undergoes combustion | |
c. | Both a. and b. are correct | |
d. | Question does not provide sufficient data or is vague |
Question 3
Question MCQ▾
Combustion is defined as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Substance which vapourise during burning form a flame | |
b. | Substance which produces energy | |
c. | Chemical process in which a substance react with oxygen to give off heat | |
d. | Amount of heat energy produced on complete combustion of 1kg of a fuel |
Question 4
Question MCQ▾
Ignition temperature is defined as:
Choices
Choice (4) | Response | |
---|---|---|
a. | A substance which produce energy when burnt in presence of oxygen | |
b. | Lowest temperature at which substance catches fire | |
c. | The amount of heat energy produced on complete combustion of 1 Kg of a fuel | |
d. | All of the above |