Radioactive decay follows ______________ order kinetics?

Related Mcqs:

1. Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about _______________ minutes?

   A. 3
   B. 4
   C. 6
   D. 10

2. A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be ____________________ minutes?

   A. 4
   B. 8
   C. 12
   D. 16

3. A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3. The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 k.mole/m3, the volume of the mixed flow reactor should be increased by a factor of_______________?

   A. 7
   B. 6
   C. 3
   D. 7/3

4. Equilibrium of a chemical reaction as viewed by kinetics is a ______________ state?

   A. Dynamic steady
   B. Static steady
   C. Dynamic unsteady
   D. None of these

5. Kinetics of a catalytic reaction can be best studied on a/an ______________ reactor?

   A. Mixed
   B. Integral (plug flow)
   C. Differential (flow)
   D. Either A., B. and C.

6. Kinetics of a solid catalysed reaction can best be studied in a _________________ reactor?

   A. Batch
   B. Plug-flow
   C. Mixed
   D. None of these

7. Chemical kinetics can predict the _______________ of a chemical reaction?

   A. Rate
   B. Feasibility
   C. Both A. & B.
   D. Neither A. nor B.

8. Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the ___________________?

   A. Activation energy
   B. Equilibrium constant
   C. Heat of reaction
   D. None of these

9. For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?

   A. -rA = (k . PA . PB)/(1 + KAPA + KPPP)
   B. -rA = (k . PA
   2 – k1PP)/(1 + KAPA + KPPP)
   C. -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
   D. -rA = (k . PA . PB)/(1 + KAPA)

10. Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?

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