Assertion :The range of temperature and its rate of diurnal and seasonal variation plays a very important role for green plants. Reason: Food chain is transfer of food energy (stored in green plants) starting from, green plants passing through a series of organisms with repeated eating and being eaten.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
The temperature changes depending on seasonal variations. This change in the temperature is necessary for the green plants to carry out photosynthesis at a definite rate during diurnal and seasonal changes. The food chain is the transfer or flow of energy from producers to consumers. The food chain starts from the plants. However, the food chain does not completely depend on the variations in the temperature according to seasons. Both the assertion and reason are correct but the reason is not the correct explanation for the assertion.
So, the correct answer is option B.

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

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

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(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.

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

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