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Haryana PMT Haryana PMT Solved Paper-2003

  • question_answer
    In III group of basic radical analysis, \[N{{H}_{4}}Cl\]is added before group reagent\[N{{H}_{4}}OH\]. This is done to:

    A)  increase the solubility product of III group salts

    B)  decrease the solubility product of III group salts

    C)  increase the ionic product of \[O{{H}^{-}}\]and III group radicals

    D)  decrease the degree of ionisation of group reagent

    Correct Answer: D

    Solution :

                    \[N{{H}_{4}}Cl\] is added before \[N{{H}_{4}}OH\], to decrease its ionisation (by common ion effect) so that only IIIrd group radical hydroxides precipitate.


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