Identify the inorganic sulphides that are yellow in colour : (A) $(\mathrm{NH}_{4})_{2}\mathrm{~S}$ (B) PbS (C) CuS (D) $\mathrm{As}_{2}\mathrm{~S}_{3}$ (E) $\mathrm{As}_{2}\mathrm{~S}_{5}$ Choose the correct answer from the options given below :

JEE Main · 2025 · 28 Jan 2025 · Shift 2 · Practical and Analytical Chemistry

Identify the inorganic sulphides that are yellow in colour :
(A)

(NH_{4})_{2} S

(B) PbS
(C) CuS
(D)

As_{2} S_{3}

(E)

As_{2} S_{5}

Choose the correct answer from the options given below :

(A)(A) and (C) only
(B)(A), (D) and (E) only✓ Correct
(C)(A) and (B) only
(D)(D) and (E) only

Answer: (B)

Solution

Yellow sulphides: ammonium sulphide

(N H_{4})_{2} S

is yellow, orpiment

A s_{2} S_{3}

is bright yellow, and

A s_{2} S_{5}

is pale yellow.

PbS

and

CuS

are black. Hence the yellow ones are (A), (D) and (E).

JEE Main · 2025 · 28 Jan 2025 · Shift 2 · Single correct option

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