Question

Which of the following is/are not the penta-atomic ion ?
I) Ammonium ion II) Nitrate ion III) Hydrogen carbonate ion He
IV) Sulphate ion V) Phosphate ion VI) Sulphite ion
a) I, II and VI b) II, III and IV c) Only II
d) II and V​

Answer 1

Explanation:

d) || and v

nitrate ion and phosphate ion

Answer 2

Let us look at the answer:

Explanation:

The ammonium ion(NH₄⁺) is penta- atomic ion.

The nitrate ion (NO₃⁻) is tetra - atomic ion.

The hydrogen carbonate ion (HCO₃⁻) is a penta- atomic ion.

The sulphate ion (SO₄²⁻) is a penta-atomic ion.

The phosphate ion (PO₄³⁻) is a penta-atomic ion

the sulphite ion( SO₃²⁻)  is a tetra-atomic ion.

So, only nitrate and sulphite ion is not penta-atomic ion.