JEE Main 2023ChemistryChemical KineticsEasyMCQ

JEE Main 2023 — Chemical Kinetics Question with Solution

JEE Main 2023 (11 Apr Shift 2)

Question

For a chemical reaction A+B→ Product, the order is 1 with respect to A and B.
Rate
mol L-1 S-1		 [A]
mol L-1		 [B]
mol L-1
0.10 20 0.5
0.40 x 0.5
0.80 40 y

What is the value of x and y?

Choose an option

Show full solutionCorrect option: C
Correct answer
C80 and 2

Step-by-step explanation

To determine the values of x and y, we can use the information provided and the rate expression for the given reaction, which is first order with respect to both A and B:

Rate r = K[A]1 [B]1

0.1 = K(20)1 (0.5)1 …(i) 0.40 = K(x)1 (0.5)1 …(ii)  0.80 = K(40)1 (y)1 …(iii)

From (i) and (ii)

x = 80

From (i) and (iii)

y = 2

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About this question

This is a previous-year question from JEE Main 2023, covering the Chemical Kinetics chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.