The rate of a gaseous reaction is given by the expression k [A][B]. If the volume of the reaction vessel is suddenly reduced to 1/4 th of the initial volume, the reaction rate relating to original rate will be

In a reaction \(\longrightarrow\) B, the rate of reaction increases two times on increasing the concentration of the reactant four times, then order of reaction is 

 The rate of  the reaction 2 NO + CI₂ \(\rightarrow\) 2NOCI is given by the rate equation : rate = k [NO]₂ [CI₂]. The value  of the rate constant can be increased by

The unit of rate constant for a zero order reaction is

A first order reaction has a half-life period of 34.65 seconds. Its rate constant is 

Rate constant of a reaction (k) is 175 litre² mol^-2 sec^-1. What is the order of reaction?

The molecularity and order of the reaction 2 NO (g) + O₂ (g) \(\rightarrow\)2NO₂ (g) are respectively

The rate of a chemical reaction doubles for every 10^oC rise of temperature. If the temperature is raised by 50^oC, the rate the reaction increses by about :

75% of the first order reaction was completed in 32 min. 50% of the reaction was completed in

1[A] vs time is a straight line. The order of the reaction is

The reaction A + B \(\longrightarrow\) C has zero order. What is the rate equation ?

Write the expression showing the change of concentration with time in the exponential form for reactions of first order.

A first order reactions has rate constant k = 5.5 \(\times\) 10^-14 s^-1.  Find the half life of the reaction.

With the help of diagram explain the role of activated complex in a reaction.

From the rate expressions for the following reactions, determine their order of reaction and the dimentions of the rate constants :
(i) 3 NO (g) \(\longrightarrow\) N₂) (g) ; Rate = k [NO]₂
(ii) H₂O₂ (aq) + 3I^- (aq) + 2 H⁺ \(\longrightarrow\) 2H₂O (I) + I^-3 ; Rate = k [H₂O₂]I^-]
(iii) CH₃CHO (g) \(\longrightarrow\) CH₄ (g) + CO (g) ; Rate k[CH₃CHO]^3/2
(iv) C₂H₅CI (g) \(\longrightarrow\) C₂ H₄ (g) + HCI (g) ; Rate k[C₂H₅CI].

Define the following:
(i) Elementary step in a reaction 
(ii) Rate of reaction

Write two differences between 'order of reaction' and 'molecularity of reaction'.

(a) Define the following:
(i) Order of a reaction
(ii) Elementary step in a reaction
(b) A first order reaction has a rate constant value of 0.00510 min^-1.  If we begin with 0.10 M concentration of the reactant, how much of the reactant will remain after 3.0 hours?

(a) Explain the following terms:
(i) Order of a reaction
(ii) Molecularity of a reaction
(b) The rate of a reaction increases four times when the temperature changes from 300 k to  320 K.  Calculate the energy of activation of the reaction, assuming that it does not change with temperature.
(R = 8.314 J K^-1 mol^-1)