Question

7. On adding dilute ammonia solution to a colourless
solution of a salt, a white gelatinous precipitate appears.
This precipitate however dissolves on addition of excess
of ammonia solution. Identify (choose from Na, Al, Zn,
Pb, Fe)
(a) Which metal salt solution was used ?
(b) What is the formula of the white gelatinous
precipitate obtained ?​

Answer 1

Answer:

a. Zn

b. zinc hydroxide Zn(OH)2