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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
Consider the following equilibrium $AgCl\downarrow +2N{{H}_{3}}\rightleftharpoons {{\left[ Ag{{\left( N{{H}_{3}} \right)}_{2}} \right]}^{+}}+C{{l}^{-}}$ White precipitate of $AgCl$ appears on adding which of the following
  • A
    $NH_3$
  • B
    aqueous $NaCl$
  • ✓
    aqueous $HNO_3$
  • D
    aqueous $NH_4Cl$
✓

Answer

Correct option: C.
aqueous $HNO_3$
c
$2HN{O_3}(aq) + [Ag{(N{H_3})_2}^ + ] + C{l^ - }$ $ \to AgCl(s) \downarrow  + 2N{H_3} + 2NO_3^ - $

When nitric acid is added to amine solution, solution is made acidic and the complex ion dissociates and liberate silver ion to recombine with chloride ion. This is the conformatory test for silver in group $1$.

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