NEET Sample Paper NEET Sample Test Paper-72

  • question_answer
    In which of the following process, roasting and self-reduction is required?

    A) \[C{{u}_{2}}S\to C{{u}_{2}}O\]          

    B) \[\operatorname{CaC}{{O}_{3}}\to CaO\]

    C) \[ZnS\,\,\to \,\,Zn\]                     

    D) \[PbS\to Pb\]

    Correct Answer: D

    Solution :

    \[PbS \xrightarrow{{}} Pb \left( Roasting + Self-reduction \right)\] \[{{\operatorname{Cu}}_{2}}S\,\,\xrightarrow{{}} C{{u}_{2}}\,O \left( Roasting \right)\] \[\operatorname{CaC}{{O}_{3}} \xrightarrow{{}} CaO \left( Roasting + Carbon reduction \right)\]\[\operatorname{ZnS} \xrightarrow{{}} Zn \left( Roasting + Carbon reduction \right)\]


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