Question

$S{O}_2$, as a pollutant can be controlled by:
(I) Using solar energy, nuclear energy, hydroelectric energy.
(II) Using low-sulphur fuels, natural gas.
(III) The desulphurisation of high-sulphur coal and oil before burning by FGD (Fuel-gas desulphurisation).
(IV) Using water under high pressure.
The correct methods are:

• A. Both I and II
• B. Both I and III
• C. I, II and IV
• D. I, II and III

Answer 1

The correct option is D I, II and III

$S{O}_2$ is released into the atmosphere as a result of burning of fossil fuels.

It is also released from the smelting and roasting of sulphide ores.

The emission of $S{O}_2$ can be reduced by using other forms of energy such as solar energy, nuclear energy and hydroelectric energy.

Fuels containing sulphur are desulphonated before burning by FGD.

When wter is used at high pressure, it will dissolve $S{O}_2$ which in turn reduced the pH of the soil. Thus the fertility of the soil is reduced.