Question

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

• A. High Pressure
• B. High temperature
• C. Excess of oxygen
• D. Using a catalyst

Answer 1

Answer: (B), (C), (D)

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.