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Select pair(s) in which both produces same coloured ppt. with CrO ₄²⁻ ion

Options

  1. ABa ²⁺, Sr ²⁺
  2. BPb ²⁺, Ba ²⁺
  3. CAg ⁺, Ba ²⁺
  4. DAg ⁺, Hg ₂²⁺

Correct answer

D. Ag ⁺, Hg ₂²⁺

Step-by-step solution

. array l Ba ²⁺ CrO ₄²⁻ BaCrO ₄ ~Pb ²⁺ CrO ₄²⁻ PbCrO ₄ Sr ²⁺ CrO ₄²⁻ SrCrO ₄ array Yellow ppt. . array l 2 Ag ⁺ CrO ₄^2 Ag ₂ CrO ₄ Hg ₂²⁺ CrO ₄²⁻ Hg ₂ CrO ₄ array Red ppt.

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