Chemical Reaction Engineering
In the converter of the contact process for the manufacture of H₂SO₄ the equilibrium conversion of SO₂ __________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO₂ to air.

(i) increases (ii) increases
(i) decreases (ii) increases
(i) decreases (ii) decreases
(i) increases (ii) decreases

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Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Desorption of C
Surface reaction between absorbed A and absorbed B
Surface reaction between A in the gas phase and absorbed B
Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase

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