Chemistry · 2015
NEET 2015 · 3 May · Code E · Q72
The K_sp of Ag_2 CrO_4, AgCl, AgBr and AgI are respectively, 1.1 × 10^-12, 1.8 × 10^-10, 5.0 × 10^-13, 8.3 × 10^-17. Which one of the following salts…
The $\displaystyle \mathrm{K}_{\text {sp }}$ of $\displaystyle \mathrm{Ag}_2 \mathrm{CrO}_4, \mathrm{AgCl}, \mathrm{AgBr}$ and AgI are respectively, $\displaystyle 1.1 \times 10^{-12}, 1.8 \times 10^{-10}$, $\displaystyle 5.0 \times 10^{-13}, 8.3 \times 10^{-17}$. Which one of the following salts will precipitate last if $\displaystyle \mathrm{AgNO}_3$ solution is added to the solution containing equal moles of $\displaystyle \mathrm{NaCl}, \mathrm{NaBr}, \mathrm{NaI}$ and $\displaystyle \mathrm{Na}_2 \mathrm{CrO}_4$ ?
Official answer
(4)
$\displaystyle \mathrm{Ag}_2 \mathrm{CrO}_4$
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NEET (UG) 2015 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.