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 ${104.5}^{\circ }$.
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.

• A. A is false but R is true
• B. A is true but R is false
• C. Both A and R are true, and R is the correct explanation of A
• D. Both A and R are true, but R is not the correct explanation of A

Answer 1

The correct option is C Both A and R are true, and R is the correct explanation of A

The H — O — H bond angle in water molecule is ${104.5}^{\circ }$ as shown above in the structure.
Repulsion between lone pair-lone pair electrons is higher than bond pair-bond pair electrons because bond pair electrons are stuck between two nuclei. So, option (c) is correct.