An aqueous solution of a metal salt, M, gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia. Therefore cartion in M is
-
A.
Zn ++ -
B.
Ca++ -
C.
Ai+++ -
D.
Pb++ -
E.
Cu++