Chapter 21, Problem 21.30QP

Interpretation Introduction

Interpretation: The reaction that leads to formation of Sulphur in volcanic eruptions should be determined.

Concept Introduction:

Acid rain: Rain is considered as acid rain when the concentration of acid is high in rain water that is $\text{pH}$ in rain water becomes too low and the acid rain has harmful effects on the living organism due to increased acid concentration.

Sulphur dioxide is the gas responsible for acid rain formation.

The volcanic eruptions are the primary source for the two-third percent composition present in the air.

Oxidation: It is type of reaction which involves loss of electrons or removal of hydrogen and addition of oxygen atom.

Reduction: It is also type of reaction in which the electrons gets added or addition of hydrogen and removal of oxygen atom.

Not only natural reasons like volcanic eruptions but also the industries are responsible for formation of acid rain.

The process that leads to acid rain is as follows,

1. 1) Extraction of metal from minerals involves process like roasting, smelting and refining which releases ${\text{SO}}_{\text{2}}$ into atmosphere.
2. 2) Burning of fossil fuels in industries also increases ${\text{SO}}_{\text{2}}$ concentration in atmosphere.

To determine: The reaction between ${\text{SO}}_{\text{2}}$ and hydrogen sulfide.