1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
In a reaction, A + B $$ \to $$ product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentration of both the reactants (A and B) are doubled, rate law for the reaction can be written as
A
rate = k[A][B]2
B
rate = k[A]2[B]2
C
rate = k[A][B]
D
rate = k[A]2[B]
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
In a zero-order reaction, for every 10oC rise of temperature, the rate is doubled. If the temperature is increased from 10oC to 100oC, the rate of the reaction will become
A
256 times
B
512 times
C
64 times
D
128 times
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
The rate of the reaction :   2N2O5 $$ \to $$ 4NO2 + O2
can be written in three ways.

$${{ - d\left[ {{N_2}{O_5}} \right]} \over {dt}} = k\left[ {{N_2}{O_5}} \right]$$

$${{d\left[ {N{O_2}} \right]} \over {dt}} = k'\left[ {{N_2}{O_5}} \right];\,\,$$ $${{d\left[ {{O_2}} \right]} \over {dt}} = k''\left[ {{N_2}{O_5}} \right]$$

The relationship between k and k' and between k and k'' are
A
$$k' = 2k ;  k'' = k$$
B
$$k' = 2k ;  k'' = k/2$$
C
$$k' = 2k ;  k'' = 2k$$
D
$$k' = k ;  k'' = k$$
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
The half-life of a substance in a certain enzyme-catalysed reaction is 138 s. The time required for the concentration of the substance to fall from 1.28 mg L$$-$$1 to 0.04 mg L$$-$$1 is
A
414 s
B
552 s
C
690 s
D
276 s
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