Chemical Kinetics

For the reaction, N2 + 3H2 \(\to\) 2NH3, if
\({{d\left[ {N{H_3}} \right]} \over {dt}}\) = 2 \(\times\) 10\(-\)4 mol L\(-\)1 s\(-\)1,
the value of \({{ - d\left[ {{H_2}} \right]} \over {dt}}\) would be

For the reaction A + B \(\to\) products, it is observed that
(i)  on doubling the initial concentration of A only, the rate of reaction is also doubled and
(ii)  on doubling the initial concentration of both A and B, there is a change by...

In the reaction,
BrO\(_{3(aq)}^ -\) + 5Br\(_{(aq)}^ -\) + 6H+ \(\to\) 3Br2(l) + 3H2O(l).
The rate of appearance of bromine (Br2) is related to rate of disappearance of bromide ions as

The bromination of acetone that occurs in acid solution is represented by this equation.
CH3COCH3(aq) + Br2(aq)  \(\to\)
     CH3COCH2Br(aq) + H+(aq) + Br\(-\)(aq)
These kinetic data were obtained for given reaction concentrations.

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The rate constants k1 and k2 for two different reactions are 1016 \(\cdot\) e\(-\)2000/T and 1015 \(\cdot\) e\(-\)1000/T, respectively.
The temperature at which k1 = k2 is

In a first-order reaction A \(\to\) B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately
(log 4 = 0.60, log 5 = 0.69)

The reaction of hydrogen and iodine monochloride is given as :
H2(g) + 2ICl(g) \(\to\) 2HCl(g) + I2(g)
This reaction is of first order with respect to H2(g) and ICl(g),
following mechanisms were proposed.
Mechanism A :
     H2(g) + 2ICl(...

For the reaction, 2A + B \(\to\) 3C + D, which of the following does not express the reaction rate?

Consider the reaction :  N2(g) + 3H2(g) \(\to\) 2NH3(g)
The equality relationship between \({{d\left[ {N{H_3}} \right]} \over {dt}}\) and \(- {{d\left[ {{H_2}} \right]} \over {dt}}\) is

The rate of reaction between two reactions A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is

For a first order reaction A \(\to\) B the reaction rate a reactant concentration of 0.01 M is found to be 2.0 \(\times\) 10\(-\)5 mol L\(-\)1 s\(-\)1. The half-life period of the reaction is

The rate of a first order reaction is 1.5 \(\times\) 10\(-\)2 mol L\(-\)1 min\(-\)1 at 0.5 M concentration of the reactant. The half-life of the reaction is

The reaction A \(\to\) B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 hour. What is the time taken for conversion of 0.9 mole of A to produce 0.675 mole of B?

The activation energy for a simple chemical reaction A \(\rightleftharpoons\) B is E\(a\) in forward direction.
The activation energy for reverse reaction

If the rate of the reaction is equal to the rate constant, the order of the reaction is

The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, \(k = A \cdot {e^{ - E{}^ * /RT}}\). Activation energy (E\(*\)) of the reaction can be calculated by plotting

2A \(\to\) B + C It would be a zero order reaction when

For the reaction; 2N2O5 \(\to\) 4NO2 + O2 rate and rate constant are 1.02 \(\times\) 10\(-\)4 and 3.4 \(\times\) 10\(-\)5 sec\(-\)1 respectively, then concentration of N2O5 at that time will be

When a bio-chemical reaction is carried out in laboratory, outside the human body in absence of enzyme, then rate of reaction obtained is 10\(-\)6 times, the activation energy of reaction in the presence of enzyme is

For the reaction H+ + BrO\(_3^ -\) + 3Br\(-\) \(\to\) 5Br2 + H2O
which of the following relation correctly represents the consumption and formation of products.

How enzymes increases the rate of reactions