2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-84

  • question_answer
    Solubility product of a salt AB is \[1\,\,\times \,\,{{10}^{-8}}\] in a solution in which the concentration of \[{{A}^{+}}\]ions is\[{{10}^{-3}}\,\,M\]. The salt will precipitate when the concentration of \[{{B}^{-}}\] ions is kept

    A) between \[{{10}^{-8}}\] M to \[{{10}^{-7}}\]M

    B) between \[{{10}^{-7}}\] M to \[{{10}^{-8}}\]M

    C) \[\,>\,{{10}^{-5}}\]M

    D) \[\,<\,{{10}^{-8}}\]M

    Correct Answer: C

    Solution :

    [c] \[AB\overset{{}}{leftrightarrows}{{A}^{+}}{{B}^{-}}\] \[{{K}_{sp}}=\frac{[{{A}^{+}}]\,[{{B}^{-}}]}{[AB]}\] Salt will precipitate if ionic conc.\[>{{K}_{SP}}\]             \[[{{A}^{+}}][{{B}^{-}}]>1\times {{10}^{-8}}\] \[(1\times {{10}^{-3}})[{{B}^{-}}]>1\times {{10}^{-8}}\] \[[{{B}^{-}}]>\frac{1\times {{10}^{-8}}}{1\times {{10}^{-3}}}\] or \[1\times {{10}^{-5}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner