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Q.

The correct order of magnitude of bond angles among the compounds CH4, NH3 and H2O is

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a

NH3 < H2O < CH4

b

H2O < NH3 < CH4

c

NH3 < CH4 < H2O

d

CH4 < H2O < NH3

answer is A.

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Detailed Solution

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The compounds CH4, NH3 and H2O involved in sp3 hybridization. But

In CH4, the bond angle is 109.5o.

In  NH3, the bond angle changed to 107o due to the presence of a lone pair.

In H2O, the bond angle changed to 104.5o due to the presence of two lone pairs.

Hence, the order of bond angles is, H2O < NH3 < CH4.

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