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MGIMS WARDHA MGIMS WARDHA Solved Paper-2015

  • question_answer
    A light greenish coloured salt was soluble in water. On passing \[{{H}_{2}}S\] into the solution a black precipitate was obtained which dissolved readily in \[HCl\]. The metal ion present is

    A)  \[C{{o}^{2+}}\]                

    B)  \[F{{e}^{2+}}\]

    C)  \[N{{i}^{2+}}\]                 

    D)  \[M{{n}^{2+}}\]

    Correct Answer: B

    Solution :

                    \[F{{e}^{2+}}+{{H}_{2}}S\xrightarrow{{}}\underset{Black\,ppt.}{\mathop{FeS}}\,+2{{H}^{+}}\] \[FeS+2HCl\xrightarrow[{}]{{}}\underset{So\operatorname{lub}le}{\mathop{FeC{{l}_{2}}}}\,+{{H}_{2}}S\]


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