KCET · Chemistry · Chemical Kinetics

The value of rate constant of a pseudo first order reaction

A Depends only on temperature
B Depends on the concentration of reactants present in small amounts
C Depends on the concentration of reactants present in excess
D Independent of the concentration of reactants

Verified Solution

Answer & Solution

Correct Answer

(C) Depends on the concentration of reactants present in excess

Step-by-step Solution

Detailed explanation

Pseudo first order reactions are those which independent on the concentration of reactant present in excess.For
example, hydrolysis of ester. But rate constant depends on the reactant present in excess amount.

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.

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From KCET

Match List-I with List-II

List-I		List-II
a)	A matrix which is not a square matrix	i)	Symmetric matrix
b)	A square matrix \(A = A'\)	ii)	Null matrix
c)	The diagonal elements of a diagonal matrix are same	iii)	Rectangular matrix
d)	A matrix which is both symmetric and skew symmetric	iv)	Scalar matrix

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