In the reaction BrO^-₃ (aq) + 5 Br ^- (aq) + 6 H⁺ \(\longrightarrow\) 3 Br₂(I) + 3 H₂O (l), the rate of apperance of bromine (BHr₂) is related to the disapearance of bromide uions as follows :

For the reaction aA + bB \(\longrightarrow\) cC, if  -3 \(\frac {d[A]}{dt} = +1.5 \frac {d[C]}{dt},\) then a, b, and c respectively are

The unit of rate constant for a zero order reaction 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 conversion of molecules X to Y follows second order kinetics.  If concentration of X is increased to three times how will it affect the rate of formation of Y?

For a gaseous reaction, the units of the reaction are..............

In the plot of concentratiuon of reactant versus time, the tangent at any instant of time has a......... slope (opositive or negative or zero).

If the rate of reaction, 4 NH₃ + O₂ \(\longrightarrow\) 2 NO + 5 H₂O at any instant of time is 9 \(\times\) 10^-4 mol L^-1 s^-1, then rate of disapperance of NH₃ is ......... .

The rate of reaction when the concentration of each reactant is taken as unity is called ......... .

What do you understand by the rate law and rate constant of a reaction? Identify the order of a reaction if the units of its rate constant are :
(i) L^-1 mol s^-1    
(ii) L mol^-1 s^-1

Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?

The rate constant for a first order reaction is 60 s^-1. How much time will it take to reduce the concentration of the reactant to 1/10^th of its initial value?

In general it is observed that the rate of chemical reaction doubles with every 10^o rise in temperature.  If the generalization holds good for the reaction in the temperature range 295 K to 305 K, what would be the value of activation energy for the this reaction?
(R = 8.314 J mol^-1  K^-1)

Show that in case of first order reaction, the time required for 99.9% of the reaction to complete is 10 times that required for half of the reaction to take place. [log 2 = 0.301]

(a) Explain the following terms:
(i) Rate of a reaction
(ii) Activation energy of a reaction
(b) The decomposition of phosphine (PH₃) proceeds according to the following equation:
4PH₃(g) \(\to\)P₄ (g) + 6H₂ (g)
It is found that the reaction follows the following rate equation:
Rate = k [PH₃]
The half-life of PH₃ is 37.9 s at 120 ^oC.
(i) How much time is required for 3/4^th of PH₃ to decompose?
(ii) What fraction of the original sample of PH₃ remains behind after 1 minutes?