Question

Assertion (A) : Copper exhibits variable valency.
Reason (R ) : Copper loses two electrons from its valence shell and it can loss one more electron from second last shell.
A. Both A and R are true and R is the correct explanation For A.
B. Both A and R are true but R is not the correct explanation for A.
C. A is true and R is false.
D. A is false and R is true.

Answer 1

Correct Answer - 3
Copper loses one electron from its valence shell to form `Cu^(+)` and can loss one more electron from second last shell to from `Cu^(2+)` ion.