Question

In the following, which element shows variable valency?
(A) Na
(B) Ca
(C) K
(D) Cu

Answer 1

Explanation:

Cu shows variable valancies +1 and +2

Answer 2

Dear Student,

◆ Answer -

(D) 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...