Given below are two statements : one is labeled as Assertion A and the other is labelled as Reason R :
Assertion A : The H\(-\)O\(-\)H bond angle in water molecule is \(104.5^\circ\).
Reason R : The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.
In the light of the above statements, choose the correct answer from the options given below :
Assertion A : The H\(-\)O\(-\)H bond angle in water molecule is \(104.5^\circ\).
Reason R : The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.
In the light of the above statements, choose the correct answer from the options given below :
Show Hint
- Both A and R are true, and R is the correct explanation of A
- A is true but R is false
- A is false but R is true
- Both A and R are true, but R is not the correct explanation of A
The Correct Option is A
Solution and Explanation
The observed H-O-H angle is \(104.5^\circ\), so Assertion A is true.
Repulsion order (VSEPR): lone pair-lone pair \(>\) lone pair-bond pair \(>\) bond pair-bond pair, so Reason R is true.
The larger lp-lp repulsion pushes the bond pairs closer together, compressing the angle from \(109.5^\circ\) to \(104.5^\circ\), so R correctly explains A.
Answer: (1) Both A and R are true, and R is the correct explanation of A
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