Related Mcqs:

1. In case of physical adsorption, the heat of adsorption is of the order of _____________ kcal/kg mole?

   A. 100
   B. 1000
   C. 10000
   D. 100000

2. The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) ?

   A. E
   B. E + ΔHA
   C. E + ΔHA – ΔHR)
   D. ΔHA + ΔHR

3. Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure ?

   A. Langmuir adsorption isotherm
   B. Adsorption isobar
   C. Freundlich adsorption isotherm
   D. None of these

4. The rate of the heterogeneous catalytic reaction A(g) + B(g) → C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is_______________?

   A. Absorption of A
   B. Surface reaction between absorbed A and absorbed B
   C. Surface reaction between absorbed A and B in the gas phase
   D. Surface reaction between A in the gas phase and absorbed B

5. For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the ______________ adsorption?

   A. Physical
   B. Chemical
   C. Both A. and B.
   D. Neither A. nor B.

6. Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?

   A. Increases
   B. Remains unchanged
   C. Decreases
   D. Unpredictable from the data

7. B.E.T. method of finding out surface area of a catalyst, uses the extension of _________________ isotherm?

   A. Langmuir
   B. Freundlich
   C. Tempkin
   D. None of these

8. Effectiveness factor of a catalyst pellet is a measure of the _________________ resistance?

   A. Pore diffusion
   B. Gas film
   C. Chemical reaction
   D. None of these

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

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

10. Reaction rate of a first order reaction, which is half completed in 23 minutes will be _________________?

    A. 0.03 sec-1
    B. 0.03 min-1
    C. 0.03 hr-1
    D. 0.05 min-1