Which ion is not an oxyanion? no− so4 2− cn− co3 2−

CN⁻

Explanation:

Oxyanion:

Oxyanion is the anion that have oxygen atom.

General formula:

The general formula for oxyanion is AₓOₓ⁻².

A = symbol of element combining with oxygen.

O = oxygen atom

z,x, = integers

a) =  NO⁻

Its is an oxyanion because oxygen atom is present with nitrogen.

b) = SO₄⁻

It is an oxyanion because oxygen atom is present.

c) = CN⁻

This is not an oxyanion because there is no oxygen atom present.

d= CO₃²⁻

It is also an oxyanion because of presence of oxygen atom.

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