Question

Rohit took two different salt solutions in test tubes C and D as shown in the figure below. He added dilute HCl to each of the two test tubes. The products formed in the test tubes C and D are silver chloride and lead chloride respectively.

State:

1. one common observation made by Rohit in both the reactions.
2. the observations made by him on addition of excess of ammonium hydroxide to the products formed in:
   1. test tube C
   2. test tube D

Answer 1

1. One common observation is that a white precipitate is formed in both test tubes.
2. 
   
   1. When the addition of excess ammonium hydroxide to test tube C, the white precipitate dissolves as silver chloride dissolves in the presence of excess ammonium hydroxide, resulting in a clear solution.
   2. Since lead chloride only dissolves in hot water, test tube D remains unchanged when an excessive amount of ammonium hydroxide is added.