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Assertion: Dipolemoment ofphenol is smal...

Assertion: Dipolemoment ofphenol is smaller than that of methanol.
Reason: In phenol C-O bond is less polar due to electron withdrawing effect of the benzene ring whereas in methanol, C-O bond Is more polar due to electron releasing effect of `CH_3` group.

A

A. Both assertion and reason is true R is the correct expanation for A

B

B.Both A and R is true but R is not the explanation of A

C

C. Assertion is true but reason is false

D

D both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
A
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Assertion: Dipolemoment ofphenol is smaller than that of methanol. Reason: In phenol C-O bond is less polar due to electron withdrawing effect of the benzene ring whereas in methanol, C-O bond Is more polar due to +I effect of CH_3 group.

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Knowledge Check

  • Assertion : Carbon oxygen bond length of phenol is slightly less than that in methanol. Reason : There exist a partial double bond character and carbon to which oxygen is attached in phenol is sp^2 hybridised.

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    B
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    C
    If (A) is correct, but (R) is incorrect
    D
    If both (A) and (R) are incorrect.

  • Assertion : Carbon oxygen bond length of phenol is slightly less than that in methanol. Reason : There exist apartial double bond character and carbon to which oxygen is attached in phenol is sp^2 hybridised.

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    If both (A) and (R) are correct and (R) is the correct explanation of (A).
    B
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    C
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  • Assertion: Alkyl halides, though polar, are immiscible with water. Reason : Alkyl halides are polar due to the presence of polar C-X bond.

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    B
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    D
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