Chemical Reaction Engineering
In the reversible reaction of the type, A + B ⇋ AB, in general

The combination reaction will be exothermic, while the dissociation reaction will be endothermic
Both forward and backward reactions will be exothermic
Neither of the reactions will be en-dothermic
The combination reaction will be endothermic, while the dissociation reaction will be exothermic

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Chemical Reaction Engineering
Promoter.

All of these
Atlers the position of equilibrium in a reversible reaction
Initiates a chemical reaction and is a catalyst by itself
Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals

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

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