Question

The group of elements showing variable valency is-
(A) Fe,Zn
(B) Mg,Cu
(C) Fe,Cu
(D) Na,K

Answer 1

Answer:

(c)fe,cu.................

Answer 2

Dear Student,

◆ Answer - (C)

The group of elements showing variable valency is Fe, Cu.

◆ Valency -

• Valency is the combining capacity of an element.
• When single element can combine with other element/elements in different proportions, it is said to have variable valency.

Following elements have variable valencies -

• Copper shows valency of +1 and +2.
• Iron shows valency of +2 as well as +3.
• Cobalt also shows valency of +2 and +3.
• Manganese shows valencies +2, +3, +4, +6 and +7.
• Silver shows valency of +1 and +2.
• Mercury also shows valency of +1 and +2.

Thanks dear. Hope this helps you...