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Salt Analysis question

2024 · 4 Apr · Shift 1 · Q7
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  5. /2024 · 4 Apr · Shift 1 · Q7

Salt Analysis question

2024 · 4 Apr · Shift 1 · Q7

JEE MainChemistrySalt AnalysisMCQ+4 / −1
In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :
  1. A
    decrease concentration of −OH{ }^{-} \mathrm{OH}−OH ions
  2. B
    increase concentration of Cl−\mathrm{Cl}^{-}Cl− ions
  3. C
    prevent interference by phosphate ions
  4. D
    increase concentration of NH4+\mathrm{NH}_4{ }^{+}NH4​+ ions
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