1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

For a first order reaction with rate constant $$\mathrm{k}$$, the slope of the plot of $$\log$$ (reactant concentration) against time is

A
k/2.303
B
k
C
$$-$$k/2.303
D
$$-$$k
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Which of the following would give a linear plot?

(k is the rate constant of an elementary reaction and T is temp. in absolute scale)

A
k vs T
B
k vs 1/T
C
ln k vs T
D
ln k vs 1/T
3
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

For the reaction A + B $$\to$$ C, we have the following data:

Initial concentration of A (in molarity) Initial concentration of B (in molarity) Rate (initial)
(Relevant unit)
1 10 100
1 1 1
10 1 10

The order of the reaction with respect to A and B are

A
Not possible to tell with the given data.
B
First order with respect to both A and B.
C
First order with respect to A and second order with respect to B.
D
Second order with respect to A and first order with respect to B.
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The equilibrium constant for the reaction

N2(g) + O2(g) $$\rightleftharpoons$$ 2NO(g) is 4 $$\times$$ 10$$-$$4 at 2000 K. In presence of a catalyst the equilibrium is attained 10 times faster. Therefore, the equilibrium constant, in presence of the catalyst at 2000 K is
A
4 $$\times$$ 10$$-$$4
B
4 $$\times$$ 10$$-$$3
C
4 $$\times$$ 10$$-$$5
D
2.5 $$\times$$ 10$$-$$4
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