CUET · CHEMISTRY · PYQ PAPER 2025

In alcohols, C-O-H bond angle is

A Leas than the tetrahedral bond angle ( \(109^{\circ} 28^{\prime}\) )
B Higher than the tetrahedral bond angle ( \(109^{\circ} 28^{\prime}\) )
C Exactly equal to tetrahedral bond angle L.e. \(109^{\circ} 28^{\prime}\)
D Eractly equal to \(90^{\circ}\)

Verified Solution

Answer & Solution

Correct Answer

(A) Leas than the tetrahedral bond angle ( \(109^{\circ} 28^{\prime}\) )

Step-by-step Solution

Detailed explanation

Less than the tetrahedral bond angle ( \(109^{\circ} 28^{\prime}\) )

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

"Match List-I with List-II.

List-I	List-II
(Complexes)	(Hybridisation)
(A) \([\text{Ni(CO)}_4\text{]}\)	I. \(\text{sp}^3\)
(B) \([\text{Ni(CN)}_4\text{]}^{2-}\)	II. \(\text{dsp}^2\)
(C) \([\text{Fe(CN)}_6\text{]}^{4-}\)	III. \(\text{d}^2\text{sp}^3\)
(D) \([\text{MnF}_6\text{]}^{4-}\)	IV. \(\text{sp}^3\text{d}^2\)

Choose the correct answer from the options given below:"

CUET 2023 Medium

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List-I(Reaction)	List-II(Preparation)
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