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NEET Sample Paper NEET Sample Test Paper-6

  • question_answer
    Which of the following compounds turns white on treatment with \[{{H}_{2}}{{O}_{2}}\]?

    A)  \[HgS\]                       

    B)  \[PbS\]

    C)  \[NiS\]                        

    D)  \[CuS\]

    Correct Answer: B

    Solution :

    PbS turns white on treatment with hydrogen peroxide due to the formation of \[PbS{{O}_{4}}\] \[\underset{black}{\mathop{PbS}}\,+4{{H}_{2}}{{O}_{2}}\xrightarrow{{}}\underset{white}{\mathop{PbS{{O}_{4}}}}\,+4{{H}_{2}}O\]


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