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Statement-1 : Fluoromethane (CH(3)F,mu=1...

Statement-1 : Fluoromethane `(CH_(3)F,mu=1.85D)` has smaller dipole moment than chloromethane `(CH_(3)Cl,mu=1.87D)`.
Statement-2 : Fluorine has less electron affinity than that of chlorine.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a 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.

Text Solution

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The correct Answer is:
B
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CH_(3)Cl has more dipole moment than CH_(3)F because :

Statement-1 : Fluorine is more electronegative than chlorine. Statement-2 : Fluorine is smaller in size than chlorine.

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The dipole moment of CH_(3)F is greater than that of CH_(3)Cl .

Statement-1: Fluorine has a less negative electron gain enthalpy than chlorine. Statement-2: There is relative greater effectivebess of 2p-electrons in the small F atom to repel the additional electron entering the atom than to 3p-electrons in the large CI atom.

Statement-1: Manganese (atomic number 25) a less favourable electron affinity than its neighbours on either side. Statement-2: The magnitude of an element's electron affinity only depends on the element's valence shell elecronic configuration.

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