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 2006 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties JEE Main 2006

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

(1)increasing bp-bp repulsion
(2)increasing p-orbital character in
(3)decreasing lp-bp repulsion
(4)decreasing electronegativityCorrect

Answer: (4)

Solution

Down the group the central atom becomes less electronegative and larger, so the bonding pairs are drawn less towards it and lie farther apart; bp–bp repulsion

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Question ID VK-038800