1
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
The reaction 2X $$ \to $$ B is a zeroth order reaction. If the initial concentration of X is 0.2 M, the half-life is 6 h. When the initial concentration of X is 0.5 M, the time required to reach its final concentration of 0.2 M will be:
A
18.0 h
B
9.0 h
C
7.2 h
D
12.0 h
2
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
If a reaction follows the Arrhenius equation, the plot ln k vs $${1 \over {\left( {RT} \right)}}$$ gives straight line with a gradient ($$-$$ y) unit.

The energy required to active the reactant is :
A
y unit
B
y/R unit
C
yR unit
D
$$-$$y unit
3
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
For an elementary chemical reaction,

JEE Main 2019 (Online) 10th January Evening Slot Chemistry - Chemical Kinetics and Nuclear Chemistry Question 101 English

the expression for $${{d\left[ A \right]} \over {dt}}$$ is
A
2K1[A2] – K –1 [A]2
B
K1[A2] – K –1 [A]2
C
K1[A2] + K –1 [A]2
D
2K1[A2] – 2K –1 [A]2
4
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Consider the given plots for a reaction obeying Arrhenius equation (0oC < T < 300oC) : (K and Ea are rate constant and activation energy, respectively)

JEE Main 2019 (Online) 10th January Morning Slot Chemistry - Chemical Kinetics and Nuclear Chemistry Question 102 English

Choose the correct option :
A
I is right but II is wrong
B
Both I and II are correct
C
Both I and II are wrong
D
I is wrong but II is right
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