Question

Which of the following is true for silver sulphide?
This question has multiple correct options
A) On reaction with nitric acid it turns yellow due to the formation of colloidal sulphur.
B) It is non-reactive with ammonia
C) On reaction with sodium cyanide we get $Na_2Ag(CN)_3$
D) It is yellow coloured

Answer 1

Silver sulphide is a chemical compound having the molecular formula Ag2S. It is found in black coloured crystals in nature. It is an odourless compound that is soluble in hydrogen cyanide and soluble in most organic acids.

Complete Answer:
As in the question it is given that this question has multiple correct options thus, we will look for all the options to answer this question.
Option A) this option is incorrect as silver sulphide on reaction with nitric acid produces silver sulphate, nitric oxide and water and no colloidal sulphur is formed thus this option is incorrect.
Option B) This is a correct option as silver sulphide is not reactive with ammonia. It is generally insoluble with silver sulphide thus it is non reactive.
Option C) this is an incorrect option as silver sulphide on reaction with sodium cyanide we get $NaAg(CN)_2$, thus this statement is not true.
Option D) this is an incorrect option as the colour of silver sulphide is blackish grey in colour and not yellow thus this statement is not true.

Option B is the correct answer

Note:
There are three forms of silver sulphide which are monoclinic acanthite (β-form), stable below $179$ $^\circ C$, body centred cubic so-called argentite (α-form), stable above $180$ $^\circ C$, and a high-temperature face-centred cubic (γ-form) stable above$\;586\;$ $^\circ C$. The higher temperature forms are electrical conductors. Elemental silver reacts with hydrogen sulfide gas which produces silver sulfide. By the decomposition of plants and animals, hydrogen sulfide is generated.