1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
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.
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
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
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
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 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the
A
rate is proportional to the surface coverage
B
rate is inversely proportional to the surface coverage
C
rate is independent of the surface coverage
D
rate of decomposition is very slow.
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NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12