Question

The pair of compounds that can exist together is: [2014]
(a) FeCl₃, SnCl₂ (b) HgCl₂, SnCl₂
(c) FeCl₂, SnCl₂ (d) FeCl₃, KI

Answer 1

The pair of compounds that can exist together is (c) FeCl₂ , SnCl₂.

• FeCl and SnCl exists together because Fe²⁺ and Sn²⁺ have lower oxidation state and Fe²⁺ cannot be reduced by Sn²⁺ .
• Any compound  having lower oxidation state which cannot be reduced by one another can exists together.