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Hybridisation

Assertion :St...

Question

Assertion :Statement- $I$ : chloropropane has higher boiling point than chlorethane.
Reason: Statement- $I I$ : haloalkanes are polar molecules.

(A)

Statement-

I

is true, Statement-

I I

is true ; Statement-

I I

is correct explanation for Statement-

I

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(B)

Statement-

I

is true, Statement-

I I

is true ; Statement-

I I

is NOT a correct explanation for Statement-

I

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(C)

Statement-

I

is true, Statement-

I I

is false.

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(D)

Statement-

I

is false, Statement-

I I

is true.

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Solution

The correct option is B (B)Statement- $I$ is true, Statement- $I I$ is true ; Statement- $I I$ is NOT a correct explanation for Statement- $I$ .
Chloropropane has higher boiling point than chlorethane because chloropropane has higher molar mass than chlorethane.
With increase in the molar mass, boiling point increases.
Haloalkanes are polar molecules. Halogens are more electronegative than $C$ and the electron density in carbon halogen bond is more towards halogens.
Hence, Statement- $I$ is true, Statement- $I I$ is true ; Statement- $I I$ is NOT a correct explanation for Statement- $I$ .

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