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Salt Analysis question

2025 · 28 Jan · Shift 2 · Q16
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Salt Analysis question

2025 · 28 Jan · Shift 2 · Q16

JEE MainChemistrySalt AnalysisMCQ+4 / −1
Identify the inorganic sulphides that are yellow in colour : (A) (NH4)2S(NH_4)_2S(NH4​)2​S(B) PbSPbSPbS(C) CuSCuSCuS(D) As2S3As_2S_3As2​S3​(E) As2S5As_2S_5As2​S5​ Choose the correct answer from the options given below :
  1. A
    (D) and (E) only
  2. B
    (A) and (B) only
  3. C
    (A), (D) and (E) only
  4. D
    (A) and (C) only
View written solutionFree

Correct answer: A

  1. We need to identify which sulphides are yellow in colour.

  2. Recall the common colours of the given sulphides:

    • (NH4)2S(NH_4)_2S(NH4​)2​S : colourless solution / not a yellow sulphide
    • PbSPbSPbS : black
    • CuSCuSCuS : black
    • As2S3As_2S_3As2​S3​ : yellow
    • As2S5As_2S_5As2​S5​ : yellow
  3. Therefore, the yellow sulphides are: As2S3 and As2S5As_2S_3 \text{ and } As_2S_5As2​S3​ and As2​S5​

  4. Now check the options:

    • A: (D) and (E) only →\rightarrow→ correct
    • B: (A) and (B) only →\rightarrow→ wrong
    • C: (A), (D) and (E) only →\rightarrow→ wrong because (NH4)2S(NH_4)_2S(NH4​)2​S is not yellow
    • D: (A) and (C) only →\rightarrow→ wrong
  5. Hence, the correct option is: A\boxed{\text{A}}A​

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