Question

The reaction that occurs containing sulphur in volcanic eruptions is:

• A. $S+O_2\to S{O}_2$
• B. $2S{O}_2+O_2\to 2S{O}_3$
• C. $2H_{2}S+S{O}_2\to 3S+2H_{2}O$
• D. all of the above

Answer 1

The correct option is C $2H_{2}S+S{O}_2\to 3S+2H_{2}O$

The reaction that occurs containing sulphur in volcanic eruptions is
$2H_{2}S+S{O}_2\to 3S+2H_{2}O$
It is a redox reaction. It is comproportionation or
symproportionation.
Comproportionation or symproportionation is a chemical reaction in which two reactants, containing same element in different oxidation state, will form a product in which the elements reach the same oxidation state.