Assertion :Carbon dioxide is one of the important greenhouse gases. Reason: It is largely produced by respiratory function of animals and plants.

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

The increased amount of $C O_{2}$ in the air is mainly responsible for global warming. A large amount of carbon dioxide gets released into the atmosphere. Excess of $C O_{2}$ in the air is removed by green plants and this maintains an appropriate level of $C O_{2}$ in the atmosphere. The actual cause of unbalance $C O_{2}$ level is a large amount of carbon dioxide produced by the combustion of fossil fuels.

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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

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{SiO}_{2}

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