1
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Among the following statements, the correct statement about the half-life period for a first order reaction is

A
independent of concentration
B
proportional to concentration
C
inversely proportional to concentration
D
inversely proportional to the square of the concentration
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

The rate constant for the first order decomposition of a certain reaction is described by the equation $$\ln k\left(\mathrm{~s}^{-1}\right)=14.34-\frac{1.25 \times 10^4 \mathrm{~K}}{T}$$. The energy of activation for this reaction is

A
$$1.26 \times 10^4 \mathrm{~cal} \mathrm{~mol}^{-1}$$
B
$$4.29 \times 10^4 \mathrm{~cal} \mathrm{~mol}^{-1}$$
C
$$3.12 \times 10^4 \mathrm{~cal} \mathrm{~mol}^{-1}$$
D
$$2.50 \times 10^4 \mathrm{~cal} \mathrm{~mol}^{-1}$$
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion (A) The reaction

$$\begin{aligned} 2 \mathrm{NO}+\mathrm{O}_2 & \longrightarrow 2 \mathrm{NO}_2 \\ \text { and } \quad 2 \mathrm{CO}+\mathrm{O}_2 & \longrightarrow 2 \mathrm{CO}_2 \end{aligned}$$

proceeds at the same rate because they are similar.

Reason (R) Both the reactions have same activation energy.

A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
C
(A) is true and (R) is false.
D
Both (A) and (R) are false.
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