The H-C-H,H-N-H,and H-O-H bond angles (in deg | vedclass

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(B) The bond angle in a molecule is affected by the number of lone pairs and the electronegativity of the central atom.In $CH_4$ (methane),the central

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$109.5, 107.1, 104.5$

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(B) The bond angle in a molecule is affected by the number of lone pairs and the electronegativity of the central atom.In $CH_4$ (methane),the central carbon atom has $4$ bonding pairs and $0$ lone pairs,resulting in a tetrahedral geometry with a bond angle of $109.5^{\circ}$.In $NH_3$ (ammonia),the central nitrogen atom has $3$ bonding pairs and $1$ lone pair. The lone pair-bond pair repulsion reduces the bond angle to $107.1^{\circ}$.In $H_2O$ (water),the central oxygen atom has $2$ bonding pairs and $2$ lone pairs. The greater lone pair-lone pair repulsion further reduces the bond angle to $104.5^{\circ}$.Therefore,the bond angles are $109.5^{\circ}, 107.1^{\circ}, 104.5^{\circ}$ respectively.

The $H-C-H$,$H-N-H$,and $H-O-H$ bond angles (in $degrees$) in methane,ammonia,and water are respectively,closest to

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