The reaction $2 S O_{2} + O_{2} ⇌ 2 S O_{3}$ + Heat, will be favoured by:

high temperature and low pressure

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low temperature and high pressure

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high temperature and high pressure

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low temperature and low pressure

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Solution

The correct option is B low temperature and high pressure
$2 S O_{2} + O_{2} ⇌ 2 S O_{3} + H e a t$

In this reaction, heat is released i.e the reaction is exothermic, in forward reaction. Forward reactions are favoured at low temperatures and high pressures.

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In the following reversible reaction $2 S O_{2} + O_{2} ⇌ 2 S O_{3} + Q C a l$

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