The decreasing values of bond angles from NH_3 (106^ ) to SbH_3 (101^ ) down group-15 of the periodic table is due to:

JEE Main Chemistry question

The decreasing values of bond angles from () to () down group-15 of the periodic table is due to:

(A)Increasing repulsion
(B)Increasing -orbital character in
(C)Decreasing repulsion
(D)Decreasing electronegativityCorrect

Answer: (D)

Solution

Down the group, the electronegativity of the central atom (N → Sb) decreases. By Bent's rule, a less electronegative central atom directs its lone pair into an orbital with greater -character (closer to the nucleus) and pushes the bonding pairs into orbitals with

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Question ID VK-133565