The 4th higher homologue of ethane is :

butane.

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pentane.

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hexane.

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heptane.

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Solution

The correct option is C hexane.
The molecular formula of ethane is $C_{2} H_{6}$ . To get its fourth homologue, we have to add $4 \times C H_{2} = C_{4} H_{8}$ to it.

$C_{2} H_{6} + C_{4} H_{8} = C_{6} H_{14}$

$C_{6} H_{14}$ is the molecular formula of hexane.

Thus, hexane is the fourth homologue of ethane.

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functional group are known as ...............

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The 4th higher homologue of ethane is :

The correct option is C hexane.The molecular formula of ethane is C2H6. To get its fourth homologue, we have to add 4×CH2=C4H8 to it.C2H6+C4H8=C6H14C6H14 is the molecular formula of hexane.Thus, hexane is the fourth homologue of ethane.