JEE Main 2022 · 29 Jul · Shift 1 · Chemistry Q87

ChemistryInteger+4 / -1Question 87 of 90

The reaction between X and Y is first order with respect to X and zero order with respect to Y.

Experiment	[X] / mol L $^{-1}$	[Y] / mol L $^{-1}$	Initial rate / mol L $^{-1}$ min $^{-1}$
I	0.1	0.1	$2\times10^{-3}$
II	L	0.2	$4\times10^{-3}$
III	0.4	0.4	$M\times10^{-3}$
IV	0.1	0.2	$2\times10^{-3}$

Examine the data of table and calculate ratio of numerical values of M and L. (Nearest Integer)

Your answer

Answer and worked solution

Official answer: 40

Rate law rate $=k[X]$ with $k=\frac{2\times10^{-3}}{0.1}=2\times10^{-2}$ min⁻¹.

Unknowns. $L=\frac{4\times10^{-3}}{k}=0.2$ ; $M\times10^{-3}=k\times0.4=8\times10^{-3}$ , $M=8$ . Ratio $\frac{8}{0.2}=40$ .

Answer: 40

JEE Main 2022 · 29 Jul · Shift 1, Chemistry question 87