Question

One of the following pair of metals show variable valencies *

1 point

Ca , Mg

Ni , Cr

Ba , Zn

Sn , Hg​

Answer 1

Answer:

Ni, Cr show variable valencies as they are transition metals.

Explanation:

1) Both Ca and Mg has valency 2.Therefore they are not the answer.

2)Both have variable valencies.

3) Zn has variable valency but Ba has a constant valency of 2.

4)Hg has variable valency but Sn has a constant valency of 4.

Answer 2

Answer:

Ni, Cr show variable valencies as they are transition metals.

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