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Standard VIII

Chemistry

Formation of Coal

Assertion :Co...

Question

Assertion :Coal is a fossil fuel. Reason: It is formed due to decomposition of aquatic plants and animals in short period of time.

Both assertion and reason are correct and the reason is the correct explanation of the assertion

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Both assertion and reason are correct but the reason is not the correct explanation of the assertion

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Assertion is correct but the reason is incorrect

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Assertion is incorrect and the reason is correct

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Solution

The correct option is C Assertion is correct but the reason is incorrect
Coal was formed by the decomposition of plants and trees buried under the earth 300 million years ago. The slow process by which dead plants buried under the earth got converted to coal is called carbonization. So the reasoning is incorrect.
Hence option C is correct.

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Similar questions

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion: All the points (1, 0), (-1, 0), (2, 0) and (5, 0) lie on the x – axis.
Reason: Equation of the x-axis is y = 0

Choose the correct option.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

Q. Assertion: The compressibility factor for

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and

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(1 + \frac{P b}{R T})

Reason: The compressibility factor for

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