For a reaction $$3 \mathrm{~A} \rightarrow 2 \mathrm{~B}$$ The average rate of appearance of $$\mathrm{B}$$ is given by $$\frac{\Delta[B]}{\Delta t}$$...

The correct options for the rate law that corresponds to overall first order reaction is

For a certain reaction, the rate $$=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]$$, when the initial concentration of A is tripled keeping concentration of...

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : A reaction can have zero activatio...

For a chemical reaction 4A + 3B $$\to$$ 6C + 9D Rate of formation of C is 6 $$\times$$ 10$$-$$2 mol L$$-$$1 s$$-$$1 and rate of disappearance of A is ...

The given graph is a representation of kinetics of a reaction The y and x axes for zero and first order reactions, respectively are...

For a first order reaction A $$\to$$ Products, initial concentration of A is 0.1 M, which becomes 0.001 M after 5 minutes. Rate constant for the react...

For a reaction, A $$\to$$ B, enthalpy of reaction is $$-$$4.2 kJ mol$$-$$1 and enthalpy of activation is 9.6 kJ mol$$-$$1. The correct potential energ...

The slope of Arrhenius plot $$\left( {\ln \,k\,v/s{1 \over T}} \right)$$ of first order reactino is $$-$$5 $$\times$$ 103K. The value of Ea of the rea...

An increase in the concentration of the reactants of a reaction leads to change in :

The rate constant for a first order reaction is 4.606 $$ \times $$ 10-3 s-1. The time required to reduce 2.0 g of the reactant to 0.2 g is :...

If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction is given by :

For the chemical reaction N2(g) + 3H2(g) ⇌ 2NH3(g) the correct option is :

The correct difference between first and second order reactions is that

When initial concentration of the reactant is doubled, the half-life period of a zero order reaction

Mechanism of a hypothetical reaction X2 + Y2 $$ \to $$ 2XY, is given below : (i)   X2 $$ \to $$ X + X (fast) (ii)  X + Y2 $$\r...

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? ...

The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the

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 addition of a catalyst during a chemical reaction alters which of the following quantities?

The rate constant of the reaction A $$ \to $$ B is 0.6 $$ \times $$ 10$$-$$3 mol L$$-$$1 s$$-$$1. If the concentration of A is 5 M, then concentratio...

The activation energy of a reaction can be determined from the slope of which of the following graphs?

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is

For a reaction between A and B the order with respect to A is 2 and the other with respect to B is 3. The concentrations of both A and B are doubled, ...

A reaction is 50% complete in 2 hours and 75% complete in 4 hours. The order of reaction is

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R = 8.314 J mol$$-$$1 K$$-$$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 concentra...

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...

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\l...

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....

The unit of rate constant for a zero order reaction is

Which one of the following statements for the order of a reaction is incorrect?

The rate of the reaction, 2NO + Cl2 $$ \to $$ 2NOCl is given by the rate equation rate = k[NO]2[Cl2]. The value of the rate constant can be increased ...

For the reaction N2O5(g) $$ \to $$  2NO2(g) + 1/2O2(g) the value of rate of disappearance of N2O5 is given as 6.25 $$ \times $$ 10$$-$$3 m...

During the kinetic study of the reaction, 2A + B $$ \to $$ C + D, following results were obtained .tg {border-collapse:collapse;border-spacing:0;} ....

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...

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

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...

Half-life period of a first order reaction is 1386 seconds. The specific rate constant of the reaction is

The rate constants k1 and k2 for two different reactions are 1016 $$ \cdot $$ e$$-$$2000/T and 1015 $$ \cdot $$ e$$-$$1000/T, respectively. The tem...

The bromination of acetone that occurs in acid solution is represented by this equation. CH3COCH3(aq) + Br2(aq)  $$ \to $$   &nbs...

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 = 0.6...

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

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...

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

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

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 reactio...

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$$...

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 rea...

The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $$k = A \cdot {e^{ - E{}^ * /RT}}$$....

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

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

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

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 tim...

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 respecti...

How enzymes increases the rate of reactions

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

Activation energy (E$$a$$) and rate constants (k1 and k2) of a chemical reaction at two different temperatures (T1 and T2) are related by...