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The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions, is List-I List-II (P) Passing H ₂ ~S in the presence of NH ₄ OH (1) Cu ²⁺ (Q) ( NH ₄ )₂ CO ₃ in the presence of NH ₄ OH (2) Al ³⁺ (R) NH ₄ OH in the presence of NH ₄ Cl (3) Mn ²⁺ (S) Passing H ₂ ~S in the presence of dilute HCl (4) Ba ²⁺ (5) Mg ²⁺

Options

  1. AP 3 ; Q 4 ; R 2 ; S 1
  2. BP 4 ; Q 2 ; R 3 ; S 1
  3. CP 3 ; Q 4 ; R 1 ; S 5
  4. DP 5 ; Q 3 ; R 2 ; S 4

Correct answer

A. P 3 ; Q 4 ; R 2 ; S 1

Step-by-step solution

Mn ⁺² H ₂ ~S + NH ₄ OH Pink/buff ppt. MnS Ba ⁺² ( NH ₄ )₂ CO ₃+ NH ₄ OH White ppt. BaCO ₃ Al ⁺³ NH ₄ Cl + NH ₄ OH White ppt. Al ( OH )₃ Cu ⁺² H ₂ ~S + HCl (dil.) Black ppt. CuS

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