The decreasing values of bond angles from NH3 (106o) to SbH3 (91o ) down group-15 of the periodic table is due to

Question

The decreasing values of bond angles from NH₃ (106^o) to SbH₃ (91^o ) down group-15 of the periodic table is due to

increasing bp-bp repulsion

increasing p-orbital character in sp³

decreasing lp-bp repulsion

decreasing electronegativity

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