1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct difference between first and second order reactions is that
A
the rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations
B
the half-life of a first-order reaction does not depend on [A]0 ; the half-life of a second order reaction does depend on [A]0
C
a first-order reaction can be catalysed; a second-order reaction cannot be catalysed
D
the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
2
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
When initial concentration of the reactant is doubled, the half-life period of a zero order reaction
A
is halved
B
is doubled
C
is tripled
D
remains unchanged.
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
A first order reaction has a specific reaction rate of 10$$-$$2 sec$$-$$1. How much time will it take for 20 g of the reactant to reduce to 5 g?
A
138.6 sec
B
346.5 sec
C
693.0 sec
D
238.6 sec
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
Mechanism of a hypothetical reaction
X2 + Y2 $$ \to $$ 2XY, is given below :
(i)   X2 $$ \to $$ X + X (fast)
(ii)  X + Y2 $$\rightleftharpoons$$ XY + Y (slow)
(iii) X + Y $$ \to $$ XY (fast)
The overall order of the reaction will be
A
2
B
0
C
1.5
D
1
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