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

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

Both ASSERTION $&$ REASON are correct and REASON is the correct explanation for ASSERTION

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Both ASSERTION $&$ 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 $&$ REASON are incorrect.

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Solution

The correct option is A
Both ASSERTION $&$ REASON are correct and REASON is the correct explanation for ASSERTION

Here we have alkanes that differ by one - $C H_{2}$ - (methylene) in molecular formula/weight. The subsequent homologues of alkanes differ by a - $C H_{2}$ - . Thus the reason explains the assertion, which is true.

Hence, the answer is A

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Similar questions

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

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

n - hexane $X - \to$ 2 - methyl pentane+ 3 - methyl pentane. The name of the reaction and 'x' is

Q. Assertion :Boiling point of hexane is greater than that of pentane. Reason: n-Alkanes have higher boiling points than isoalkanes.

A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at 20°Care 440mmHg for pentane and 120mm Hg for hexane. The mole fraction of pentane in the vapour phase would be:

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series. REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - CH2 - group.

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

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.