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  4. The reaction 2 SO 2+ O 2 leftharpoons 2 SO 3+ Heat, will be favoured by

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Q. The reaction $2 SO _2+ O _2 \rightleftharpoons 2 SO _3+$ Heat, will be favoured by

Equilibrium

Solution:

Since reaction is exothermic it is favoured at low temperature. There is a decrease in number of moles hence reaction is favoured at high pressure.