Which type of reaction occurs in the following equation?
3cio (aq) →→ cio, (aq) + 2cl(aq)
an oxidation reaction
a reduction reaction
a synthesis reaction
a disproportionation reaction

The right choice is → a reduction reaction

Explanation:

From the balanced equation

we can calculate the change in oxidation number of Cl in reactant and product

in reactant ClO⁻

let x= oxidation number of Cl

and oxidation number of oxygen in its compound is (-2)

and the total charge on the ClO⁻ ion = -1

in product Cl⁻

let x= oxidation number of Cl

and the total charge on the Cl⁻ ion = -1

so the oxidation number of Cl decreases from +1 in reactant to -1 in product so it is reduction reaction.

But, disproportionation reaction is defined as the chemical reaction in which a single substance gets reduced as well as oxidized.

For a disproportionated substance  , it should contain at least three oxidation states. which isn't the case here.

So, the right choice is:

→ a reduction reaction

the answer would be a