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(A): The bond dissociation energy of flu...

(A): The bond dissociation energy of fluorine is less than bromine.
(R): In fluorine molecule, large lone pair electronic repulsions and appreciable internuclear repulsions are present.

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

Both (A) and (R ) are false

Text Solution

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The correct Answer is:
A
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(A) : The bond dissociation energy of fluorine is less than bromine. ( R ) : In fluorine molecule, large lone pair electronic repulsions and appreciable inter-nuclear repulsions are present.

Electron gain enthalpy of fluorine is less than that of chlorine. Why?

Knowledge Check

  • (A): Electron affinity of fluorine is lower than that of chlorine (R): Fluorine has small and compact size and stronger inter electron repulsion than chlorine.

    A
    Both A & R are true, R is the correct explanation of A
    B
    Both A & R are true, R is not correct explanation of A
    C
    A is true, R is false
    D
    A is false, R is true

  • Electron affinity of Fluorine is less than that of Chlorine because

    A
    Electronegativity of Fluorine is more
    B
    2p sub shell of F is smaller
    C
    Chlorine is a stronger oxidant
    D
    Bond dissociation energy of `F_2` is less

  • Electron affinity of Fluorine is less than that of Chlorine because

    A
    Electronegativity of Fluorine is more
    B
    2p sub shell of F is smaller
    C
    Chlorine is a stronger oxidant
    D
    Bond dissociation energy of `F_2` is less

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