1
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
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

How much faster would a reaction proceed at $$25^{\circ} \mathrm{C}$$ than at $$0^{\circ} \mathrm{C}$$ if the activation energy is $$65 \mathrm{~kJ}$$?

A
4 times
B
6 times
C
12 times
D
11 times
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

At $$300 \mathrm{~K}$$, the half-life period of a gaseous reaction at an initial pressure of $$40 \mathrm{~kPa}$$ is 350 s. When pressure is $$20 \mathrm{~kPa}$$, the half-life period is 175 s. What is the order of the reaction?

A
Three
B
Two
C
One
D
Zero
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

For a reaction, $$2 A+B \longrightarrow$$ products, If concentration of $$B$$ is kept constant and concentration of $$A$$ is doubled then rate of reaction is

A
doubled
B
quadrupled
C
halved
D
remain same
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