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Identify the inorganic sulphides that are yellow in colour : (A) (NH4)2S (B) PbS (C) CuS (D) As2S3 (E) As2S5 Choose the correct answer from the options given below : (1) (A) and (C) only (2) (A), (D) and (E) only (3) (A) and (B) only (4) (D) and (E) only

1. (A) and (C) only
2. (A), (D) and (E) only
3. (A) and (B) only
4. (D) and (E) only

Correct answer: (A), (D) and (E) only

Solution

(A), (D), and (E) are correct because ammonium sulfide ((NH4)2S) is yellow in solution, while arsenic sulfides (As2S3 and As2S5) are known to exhibit yellow coloration as well. In contrast, lead sulfide (PbS) and copper sulfide (CuS) are typically black.

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