For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ________________ is the controlling resistance?

Related Mcqs:

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...

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...

If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatelier’s principle)?

A. Decreases B. Increases C. Remains unaltered D. Changes unpredictably...

The units of frequency factor in Arrhenius equation_________________?

A. Are the same as those of the rate constant B. Depend on the order of the reaction C. Depend on temperature, pressure etc. of the reaction D. Are cycles per unit time...

Ionic reactions occur in____________________?

A. Solid state only B. Liquid state only C. Solutions D. Any state...