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Assertion : Alkynes are more reactive to...

Assertion : Alkynes are more reactive towards nucleophilic addition reaction as compared to alkenes.
Reason : Alkynes contain two pi bonds, while alkenes have only one pi bond.

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

C

If Assertion is correct , but Reason is incorrect.

D

If both Assertion and Reason are incorrect .

Text Solution

Verified by Experts

The correct Answer is:
B
Since sp-hybridized carbon in alkynes is more electronegative than `sp^2`-hybridized carbon in akenes , therefore , nucleophiles can attack sp-hybridized carbon more easily than `sp^2` - carbon in alkenes.
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Aryl halides are less reactive towards nucleophilic substitution reactions. Write any two reasons for the less reactivity of aryl halides.

Aryl halides are less reactive towards nucleophilic substitution reactions. Write any two reasons for the less reactivity of aryl halides.

Knowledge Check

  • Statement 1 : Alkynes are more reactive towards nucleophilic addition reaction as compared to alkenes. Statement 2 : Alkynes contain two pi bonds, while alkenes have only one pi bond.

    A
    Statement 1 is True, statement 2 is True, Statement 2 is Correct explanation for Statement 1.
    B
    Statement 1 is True, Statement 2 is True, Statement 2 is NOT a correct explanation for Statement 1.
    C
    Statement 1 is True, Statement 2 is False.
    D
    Statement 1 is False, Statement 2 is True.

  • Which one is most reactive towards nucleophilic addition reaction?

    A
    B
    C
    D

  • Assertion: Aryl halides are highly reactive towards nucleophilic substitution reactions. Reason : In case of haloarenes, halogen atom is attached to sp hybridised carbon atom.

    A
    If both (A) and (R) are correct and (R) is the correct explanation of (A).
    B
    If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
    C
    If (A) is correct, but (R) is incorrect.
    D
    If both (A) and (R) are incorrect.

    • Similar Questions

    Explore conceptually related problems

    Identify the incorrect statement/statements: i) Alkynes are more reactive than alkenes towards electrophilic addition reaction ii) Alkynes are less reactive than alkenes towards electrophilic addition reaction iii) Alkynes decolourise Br_2 water iv) Addition of HBr to alkynes in presence of peroxide proceeds via Markownikoff's rule : i and ii, ii and iii, I and iv, ii and iv

    How would you account for the following:Aldehydes are more reactive than ketones towards nucleophilic addition reaction.

    The hydration of alkenes in the presence of acids proceed via carbocation mechanisms as given below: and that carbocation is formed which is most stable, It is observed that alkenes are more reactive than alkynes towards any electrophile. This reaction, i.e., the electrophilic addition reaction of alkenes and alkynes with symmetrical addendum This shows that all reactions of alkenes and alkynes for electrophilic addition reactions may either take place via intermediates of transition state.

    Assertion: Ethyl chloride is more reactive than vinyl chloride towards nucleophilic substitution reactions. Reason : In vinyl chloride, the -CI is bonded to sp-hybridized carbon of an alkene.-

    Assertion : With respect to alkenes, the electrophilic addition reaction is reversible. Reason : Because, the direction of the reaction is controlled by decrease in free energy of the reaction.

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