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The correct order of bond angles (smallest first) in H2S, NH3 , BF3 and SiH4 is

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By Expert Faculty of Sri Chaitanya
a
H2S<SiF4<NH3<BF3
b
NH3<H2S<SiH4<BF3
c
H2S<NH3<SiH4<BF3
d
H2S<NH3<BF3<SiH4
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detailed solution

Correct option is C

Bond angle is H2S is near to 90°. Bond angle in NH3 is less than than 109°28' (a perfect tetrahedral angle) due to the electronic repulsion between lone pair and bonded pair. Bond angle in SiH4 is 109°28'. Bond angle in BF3 is 120°.


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