2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Analytical Chemistry

JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Critical Thinking Analytical

  • question_answer
    To a solution of a substance, gradual addition of ammonium hydroxide results in a black precipitate which does not dissolve in excess of \[N{{H}_{4}}OH\]. However, when \[HCl\] is added to the original solution, a white precipitate is formed. The solution contained [BHU 1973]

    A) Lead salt

    B) Silver salt

    C) Mercurous salt

    D) Copper salt

    Correct Answer: C

    Solution :

    \[H{{g}_{2}}C{{l}_{2}}\] is white insoluble salt. \[H{{g}_{2}}C{{l}_{2}}+2N{{H}_{4}}OH\to \underset{\begin{smallmatrix}   \\   \end{smallmatrix}}{\mathop{\underbrace{Hg+Hg(N{{H}_{2}})Cl}_{\text{Black}}}}\,\,+N{{H}_{4}}Cl+2{{H}_{2}}O\]


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