12th Class Chemistry Sample Paper Chemistry Olympiad Sample Paper-3

  • question_answer
    Extraction of Ag from sulphide ore and removal of unreacted silver halide from photographic plate involve complexes (respectively)

    A)   \[{{[Ag{{(CN)}_{2}}]}^{-}},{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]   

    B)  \[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}},{{[Ag{{(CN)}_{2}}]}^{-}}\]

    C)   \[{{[Ag{{(CN)}_{2}}]}^{-}},in\,\,\,\,both\]

    D)  \[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}},in\,\,\,\,both\]

    Correct Answer: A


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