Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : The $H - O - H$ bond angle in water molecule is $104.5 °$ .
Reason R : The lone pair $-$ lone pair repulsion of electrons is higher than the bond pair $-$ bond pair repulsion.

Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : The $H - O - H$ bond angle in water molecule is $104.5 °$ .

Reason R : The lone pair $-$ lone pair repulsion of electrons is higher than the bond pair $-$ bond pair repulsion.

TestHub · Accepted Answer

H 2 O θ = 104 . 5 ° The hybridisation of oxygen is water molecule is sp 3 . So electron geometry of water molecule is tetrahedral, and the bond angle should be 109 ° 28 ' ' but as we know that lone pair-lone pair repulsion of electrons is higher than the bond pair-bond pair repulsion because lone pair occupies more space around central atom than that of bond pair, The H - O - H bond angle in water molecule is 104 . 5 ° .

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

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