JEE Main & Advanced Sample Paper JEE Main Sample Paper-7

  • question_answer
    Which pair gives \[C{{l}_{2}}\] at room temperature?

    A)  Conc. \[HCl+KMn{{O}_{4}}\]     

    B)  \[NaCl+\] conc. \[{{H}_{2}}S{{O}_{4}}\]

    C)  \[NaCl+Mn{{O}_{2}}\]

    D)  \[NaCl+\] conc. \[HN{{O}_{3}}\]

    Correct Answer: A

    Solution :

    \[16HCl+2KMn{{O}_{4}}\to 2KCl+2MnC{{l}_{2}}+5C{{l}_{2}}\uparrow \]\[+8{{H}_{2}}O\]


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