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(A) The locant (2,8,7) is preferred over...

(A) The locant (2,8,7) is preferred over the locant (3,4,9 )
(R) Lowest locant number at first difference is preferred.

A

If both assertion and reason are correct and reason is the correct explanation of the assertion

B

If both assertion and reason are correct but reason is not correct explanation of the assertion.

C

If assertion is correct but reason is incorrect.

D

If assertion is incorrect but reason is correct

Text Solution

Verified by Experts

The correct Answer is:
a
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Knowledge Check

  • Assertion : The locant (2,6,7) is preferred over the locant (3,4,8) . Reason : The first term, i.e.2 in the first set is lower than the first term, i.e. 3 in the second set.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
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    C
    If the assertion is true but reason is false.
    D
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  • (A) The IUPAC name of CH_(3)-CH=CH-C-= C-H is pent-3-en-1-yne and not pent-2-en-4-yne. (R) Lowest locant rule for multiple bond is preferred.

    A
    If both assertion and reason are correct and reason is the correct explanation of the assertion
    B
    If both assertion and reason are correct but reason is not correct explanation of the assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion is incorrect but reason is correct

  • Assertion : The IUPAC name of CH_(3)CH=CH-C CH is pent -2- ene -4- yne and not pent -3- en -1- yne. Reason : While deciding the locants for double bond and triple bonds, lowest locant rule for multiple bonds is followed.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both the assertion and reason are true but the reason is not the correct explanation of assertion.
    C
    If the assertion is true but reason is false.
    D
    If assertion is false but reason is true.

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