1
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
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
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.
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
The rate of first-order reaction is 0.04 mol L$$-$$1 s$$-$$1 at 10 seconds and 0.03 mol L$$-$$1 s$$-$$1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is
A
44.1 s
B
54.1 s
C
24.1 s
D
34.1 s
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
The addition of a catalyst during a chemical reaction alters which of the following quantities?
A
Enthalpy
B
Activation energy
C
Entropy
D
Internal energy
NEET Subjects
EXAM MAP