Question

A reaction in which an element in a higher oxidation state reacts with the same element in a lower oxidation state to give the element in an intermediate oxidation state is known as:

• A. comproportionation
• B. disproportionation
• C. symproportionation
• D. None of the above

Answer 1

Answer: (A), (C)

The correct options are
A comproportionation
C symproportionation

A reaction in which an element in a higher oxidation state reacts with the same element in a lower oxidation state to give the element in an intermediate oxidation state is known as comproportionation or symproportionation.
$2H_{2}S\left(g\right)+S{O}_2\left(g\right)\to 3S\left(s\right)+2H_{2}O\left(g\right)$