Manipal MET2021ChemistryPractical Chemistry

The reagent NH ₄ Cl and aqueous NH ₃ will precipitate :

Options

ACa ²⁺
BAl ³⁺
CMg ²⁺
DZn ²⁺

Correct answer

B. Al ³⁺

Step-by-step solution

NH ₄ Cl and aqueous NH ₃ ( NH ₄ OH ) precipitates basic radicals of 3rd group of qualitative analysis hydroxides of this group have very low value of solubility product. So, this reagent will precipitate Al ³⁺ because the radicals present in 3rd group are Al ³⁺, Cr ³⁺ , and Fe ³⁺ .

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