Assertion :Alkanes containing more than three carbon atoms exhibit chain isomerism. Reason: In an alkane, all carbon atoms are $s p^{3}$ hybridised.

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
Assertion $\Rightarrow$ Chain isomerism can be defined as having same molecular formula but the different chain.
Thus alkanes having more than 3 carbon atoms exhibit chain isomerism.
Reason $\Rightarrow$ Since every carbon in alkane has 4 $σ$ bonds, hence all carbon atoms are $s p^{3}$ -hybridised.
Hence, both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion :Alkanes containing more than three carbon atoms exhibit chain isomerism. Reason: In an alkane, all carbon atoms are sp3 hybridised.

Assertion :Alkanes containing more than three carbon atoms exhibit chain isomerism. Reason: In an alkane, all carbon atoms are $s p^{3}$ hybridised.