BVP Medical BVP Medical Solved Paper-2012

  • question_answer
    A compound of zinc which is white in cold state and yellow in hot state, is

    A)  \[ZnS\]

    B)  \[ZnO\]

    C)  \[ZnC{{l}_{2}}\]

    D)  \[ZnS{{O}_{4}}\]

    Correct Answer: B

    Solution :

                    Zinc oxide is white powder, becomes yellow on heating and again white on cooling. \[\underset{white}{\mathop{ZnO(s)}}\,\underset{cooling}{\mathop{}}\,\underset{yellow}{\mathop{ZnO(s)}}\,\]


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