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(a) Desert area (b) Plane area (c) Hilly terrains (d) Both (B) and (C)

Q.8: A good fuel should possess

(a) High ignition temperature (b) Moderate ignition temperature
(c) High calorific value (d) Both high calorific value and moderate ignition
temperature

Q.8: The variety of coal which has the highest carbon content

(a) Anthracite (b) Peat (c) Bituminous (d) Lignite

Q.9: Identify the mistakes and rewrite the sentence correctly.

The industries around which other peripheral industries also develop are known as nodal
industries.

Q.10:Which of the following gases is the main constituent of natural gas?

(a) Methane
(b) Ethane
(c) Propane
(d) Butane

Q.11.In the following Questions, the Assertion and Reason have been put forward. Read the
statements carefully and choose the correct alternative from the following:

(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of
the Assertion.
(b) The Assertion and the Reason are. Correct but the Reason is not the correct explanation of
the Assertion.

(c) Assertion is true but the Reason is false.
(d) The statement of the Assertion is false but the Reason is true.

Assertion: Fuel has to be burnt to obtain heat energy.

Reason: The minimum temperature to which a fuel must be heated so that it may catch
fire and start burning is known as ignition temperature.
Ans:-Option (b)

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