Chemical Engineering > GATE 2014 > Catalysis
A vapour phase catalytic reaction (Q+R→S) follows Rideal mechanism (R and S are not adsorbed). Initially, the mixture contains only the reactants in equimolar ratio. The surface reaction step is rate controlling. With constants a and b, the initial rate of reaction (-ro) in terms of total pressure (PT) is given by
A
-ro=(aPT)/(1+bPT)
B
-ro=(aPT)/(1+bPT2)
C
-ro=(aPT2)/(1+bPT)
D
-ro=(aPT2)/((1+bPT)2)

Correct : c

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vapor phase catalytic reaction Rideal mechanism surface reaction rate chemical engineering gate 2014 reaction rate equation pressure dependence chemical kinetics GATE chemical engineering 2014 reaction rate control

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