‘If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process’. The diffusivity under this condition is called ‘Knudsen diffusivity’, which is affected by the_____________________?

A. Pressure
B. Temperature
C. Both A. & B.
D. Neither A. nor B.

consecutive reaction, as shown in the bellow figure, is characterised by __________________?

AA. Maxima in the concentration of A
B. Maxima in the concentration of B
C. Maxima in the concentration of C
D. High exothermicity

The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is______________________?

A. 0
B. 1
C. 2
D. 3

Rate of a gaseous phase reaction is given by the reaction shown in the bellow figure. The unit of rate constant is__________________?

A. (atm)-1
B. (hr)-1
C. (atm)-1.(hr)-1
D. atm.(hr)-1

If the rate of a chemical reaction becomes slower at a given temperature, then the__________________?

A. Initial concentration of the reactants remains constant
B. Free energy of activation is lower
C. Entropy changes
D. Free energy of activation is higher

There is no correspondence between stoichiometric and the rate equation in case of a/an _____________ reaction?

A. Elementary
B. Multiple
C. Autocatalytic
D. Non-elementary

The conversion in a mixed reactor/accomplishing a reaction A → 3R is 50% when gaseous reactant ‘A’ is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is _______________ second?

A. 0.5
B. 1
C. 2
D. 3

Velocity of a reaction depends upon the_________________?

A. Nature of the reactants
B. Concentration of the reactants
C. Temperature at which the reaction is carried
D. All A., B. and C.

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is _______________?

A. Zero
B. One
C. Two
D. Three