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JEE Main & Advanced JEE Main Paper (Held On 10 April 2016)

  • question_answer
    Extraction of copper by smelting uses silica as an additive to remove :   JEE Main Online Paper (Held On 10 April 2016)

    A) FeS                                        

    B) FeO

    C) \[C{{u}_{2}}S\]                 

    D) \[C{{u}_{2}}O\]

    Correct Answer: B

    Solution :

    \[\underset{Basic\,impurity}{\mathop{FeO}}\,+\underset{acidic\,flux}{\mathop{Si{{O}_{2}}}}\,\xrightarrow[{}]{{}}\underset{Slag}{\mathop{FeSi{{O}_{3}}}}\,\]


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