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Question: If the supply of oxygen is limited, \({H_2}S\) reacts with \({O_2}\) to form a.\({H_2}O + S{O_3}\...

If the supply of oxygen is limited, H2S{H_2}S reacts with O2{O_2} to form
a.H2O+SO3{H_2}O + S{O_3}
b.H2O+S{H_2}O + S
c.H2SO4+S{H_2}S{O_4} + S
d.H2O+SO2{H_2}O + S{O_2}

Explanation

Solution

The process of combining two or more substances to produce a new product is known as chemical reaction. hydrogen has great affinity towards oxygen so in limited supply of oxygen water and sulphur will be produced from hydrogen sulphide.

Complete answer:
A process in which one or more substances come together to form a new product is known as chemical reaction. It is nothing but the rearrangement of atoms of reactants in different forms according to the reactivity and physical conditions provided.
Mostly the reactions occur according to reactivity and affinity. Affinity is basically the attraction of one element towards the other. And we know that hydrogen has a great affinity towards oxygen so first of all their combination takes place. We can also predict this by our daily life as seventy percent of our earth consists of water.
So in limited supply of oxygen hydrogen has more affinity towards oxygen than the sulphur.
So the reaction of hydrogen sulphide in limited supply of oxygen is as follows:
2H2S+O22H2O+2S2{H_2}S + {O_2} \to 2{H_2}O + 2S
Here the hydrogen sulphide will burn with blue flame in limited supply of oxygen. If the hydrogen sulphide reacts in excess of oxygen, water and sulphur dioxide are produced.

Hence, option (b) is correct.

Note:
In general hydrogen sulphide is a reducing agent. Mostly it acts as a reducing agent in the presence of alkali medium. Hydrogen sulphide is a colourless gas with unpleasant odor. Hydrogen sulphide has a rotten egg smell.