Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2/sec.D1 = diffusion co-efficient; cm2/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3/sec. V = volume, cm3.) ?

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...

If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst___________________?

A. Porosity is very important B. Porosity is of less importance C. Internal surface area is utilised efficiently D. None of these...

When the reaction is dominated by intraparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as ________________?

A. nD = (n + 1)/2 B. nD = n/2 C. nD = n + 1 D. None of these...

The effect of increasing pressure on the gaseous equilibrium of the reaction 2X + 3Y ⇌ 3X + 2Y indicates that____________________?

A. Pressure has no effect B. Backward reaction is favoured C. Forward reaction is favoured D. None of these...

Pick out the correct statement?

A. Reactions with high activation energies are very temperature sensitive B. Chemical equilibrium is a static state C. A photochemical reaction is catalysed by light D. A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction...