Which of the following are favourable for the rate determing step for the ndustrial preparation of sulphuric acid (contact process)?

High Pressure

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High temperature

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Excess of oxygen

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Using a catalyst

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Solution

The correct options are
B
High temperature

C
Excess of oxygen

D
Using a catalyst

A high pressure would have been favourable for the catalytic oxidation of $S O_{2}$ but making towers which can withstand such high pressures is difficult. A high temperature is necessary for supplying the required activation energy. Excess oxygen is desirable as oxygen acts as a reactant in two steps. Lastly, a catalyst will be able to speed up the reaction.

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