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

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Chemical Reaction Engineering
Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor?

Very low temperature should be used throughout the reaction
None of these
Very high temperature should be used throughout the reaction
Temperature should be high in the beginning and decreased towards the end of the reaction

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