Question

Which of the following elements do not show variable valency copper chlorine tin mercury
1. chlorine
2.copper
3. tin
4. Mercury
​

Answer 1

Explanation:

Copper shows variable valency as it is a d block element.

Thus, copper forms compounds containing Cu

+

ions or Cu

++

ions. Representative elements sodium, calcium and magnesium shows +1, +2 and +2 oxidation states respectively.

Hence, the correct option is A

Answer 2

Answer:

Copper

Explanation:

Hope it will help you