Question

Which ion is not an oxyanion? NO− SO4 2− CN− CO3 2−

Answer 1

The ion that is not an oxyanion is the cyanide ion (CN−), as it does not contain oxygen in its structure unlike the other examples provided.

Step-by-step explanation:

The ion that is not an oxyanion from the choices NO−, SO4²−, CN−, and CO3²− is CN− (cyanide ion). Oxyanions are oxides of nonmetals that are molecular ions and typically contain oxygen in their structure. They usually end with the suffix -ate or -ite, such as in nitrate (NO3−) and nitrite (NO2−), phosphate (PO4³-) and phosphite (PO3³-), and sulfate (SO4²−) and sulfite (SO3²−). However, the cyanide ion, which is CN−, contains no oxygen and thus does not fit the definition of an oxyanion.

Answer 2

CN⁻

Step-by-step 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.