Chemical Reaction Engineering
The catalyst in a second order reversible reaction increases the rate of the forward reaction

And decreases that of backward reaction
To a greater extent than that of the backward reaction
And backward reaction equally
Only

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Chemical Reaction Engineering
In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for

Slow reactions in catalyst of large pore diameter
Slow reactions in catalyst of small pore diameter
Fast reaction in catalyst of large pore diameter
Fast reactions in catalyst of small pore diameter

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