CUET · CHEMISTRY · PYQ PAPER 2025

Reaction of Chloroethane with ethanolic ammonia will result in :

A Ethanamine
B N-Ethylethanamine
C N,N-Diethylethanamine
D Quaternary ammonium salt

Verified Solution

Answer & Solution

Correct Answer

(A) Ethanamine

Step-by-step Solution

Detailed explanation

\( \text{CH}_3\text{CH}_2\text{Cl} + \text{NH}_3 \rightarrow \text{CH}_3\text{CH}_2\text{NH}_2 + \text{HCl} \) Product: Ethanamine

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 the elements given in List-I with electronic configuration given in List-II

List - I (Element)	List - II (Electronic configuration)
(A) Cerium	(I) \([ Xe ] 4 f^{f 12} 6 s^2\)
(B) Erbium	(II) \([ Rn ] 5 f^7 6 d^1 7 s^2\)
(C) Uranium	(III) \([ Xe ] 4 f^1 5 d^1 6 s^2\)
(D) Curium	(IV) \([ Rn ] 5 f^3 6 d^1 7 s^2\)

Choose the correct answer from the options given below:

CUET 2025 Hard

The quantity of charge required to obtain \(2\text{ mol}\) of \(\text{Mn}^{2+}\) from \(\text{MnO}_4^{-}\) is:

CUET 2023 Medium

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List-I	List-II
(A) absolute maximum value	(I) 5
(B) absolute minimum value	(II) 60
(C) point of absolute maxima	(III) 3
(D) point of absolute minima	(IV) 32