For a chemical reaction A + B $\to$ Product, the order is 1 with respect to A and B. | Rate $\mathrm{mol\ L^{-1}\ S^{-1}}$ | [A] $\mathrm{mol\ L^{-1}}$ | [B] $\mathrm{mol\ L^{-1}}$ | | 0.10 | 20 | 0.5 | | 0.40 | $x$ | 0.5 | | 0.80 | 40 | $y$ | What is the value of $x$ and $y$ ?

JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 11 April 2023, Shift 2, Chemistry Q63

Question 63 of 90 in this shift, Chemistry question 3 of 30, Section A.

For a chemical reaction A + B

\to

Product, the order is 1 with respect to A and B.

Rate $\mathrm{mol\ L^{-1}\ S^{-1}}$	[A] $\mathrm{mol\ L^{-1}}$	[B] $\mathrm{mol\ L^{-1}}$
0.10	20	0.5
0.40	$x$	0.5
0.80	40	$y$

What is the value of

x

and

y

The figure, in words

Table with columns Rate (mol L^-1 s^-1), [A] (mol L^-1), [B] (mol L^-1); rows: 0.10, 20, 0.5; 0.40, x, 0.5; 0.80, 40, y.

(1)80 and 2Official answer
(2)40 and 4
(3)160 and 4
(4)80 and 4

Official answer

Option 1

NTA final key.

Chapter: Chemical Kinetics
Topic: Rate Laws
Idea tested: Initial Rates Method

Same idea in other shifts

Asked 9× in all

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.