CUET · CHEMISTRY · PYQ PAPER 2023

Fuel cell involves __________.

A The reaction of \(H _2\) with \(O _2\) to give \(H _2 O\)
B The splitting of \(H _2 O\) to give \(O _2\)
C The splitting of \(H _2 O\) to give \(H _2\)
D The reaction of \(H _2\) and \(H _2 O\) to give \(O _2\)

Verified Solution

Answer & Solution

Correct Answer

(A) The reaction of \(H _2\) with \(O _2\) to give \(H _2 O\)

Step-by-step Solution

Detailed explanation

The reaction of \(H _2\) with \(O _2\) to give \(H _2 O\)

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 (Components of binary solution)	List-II (Deviation from Raoult's Law)
(A) Ethanol and water	(I) Positive
(B) Chloroform and acetone	(II) No deviation
(C) n-Hexane and n-heptane	(III) Negative
(D) Carbon disulphide and acetone	(IV) Large positive
(D) Carbon disulphide and acetone	(IV) Large positive

Choose the correct answer from the options given below:

CUET 2025 Hard

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From CUET

Match List - I with List - II.

List - I	List - II
(A) The common region determined by all the constraints of LPP is called	(I) objective function
(B) Minimize \(z=c_1 x_1+c_2 x_2+\cdots+c_n x_n\) is	(II) convex set
(C) A solution that also satisfies the non-negative restrictions of a LPP is called	(III) feasible region
(D) The set of all feasible solutions of a LPP is a	(IV) feasible solution

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CUET 2023 Easy

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