1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the presence of a catalyst at a given temperature of $$27^{\circ} \mathrm{C}$$, the Activation energy of a specific reaction is reduced by $$100 \mathrm{~J} / \mathrm{mol}$$. What is the ratio between the rate constants for the catalysed $$(\mathrm{k}_2)$$ and uncatalysed $$(\mathrm{k}_1)$$ reactions?

A
$$1.04 \times 10^{-2}$$
B
$$2.32 \times 10^{-2}$$
C
1.97
D
1.04
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The following data was recorded for the decomposition of XY compound at 750K

[XY] mol / L Rate of decomposition of XY mol / L s
0.4 $$5.5\times10^{-7}$$
0.8 $$22.0\times10^{-7}$$
1.2 $$49.5\times10^{-7}$$

What is the order of reaction with respect to decomposition of XY?

A
0
B
2
C
1
D
1.5
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The Activation energy for the reaction $$A \rightarrow B+C$$, at a temperature $$\mathrm{TK}$$ was $$0.04606 \mathrm{~RT} \mathrm{~J} / \mathrm{mol}$$. What is the ratio of Arrhenius factor to the Rate constant for this reaction?

A
1.585
B
$$3.2 \times 10^{-2}$$
C
$$1.047 \times 10^{-2}$$
D
1.047
4
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The time required for $$80 \%$$ of a first order reaction is "$$y$$" times the half-life period of the same reaction. What is the value of "$$y$$"?

A
3.22
B
2.32
C
0.322
D
2.96
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