2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-3

  • question_answer
    A 1.0 M solution with respect to each of the metal halides \[A{{X}_{3}},B{{X}_{2}},C{{X}_{3}}\]and \[D{{X}_{2}}\]is electrolysed using platinum electrodes. If \[E{{{}^\circ }_{{{A}^{3+}}/A}}=1.50V,\,E{{{}^\circ }_{{{B}^{2+}}/B}}=0.3V,\,E{{{}^\circ }_{{{C}^{3+}}/C}}=0.74V,\]\[E{{{}^\circ }_{{{D}^{2+}}/D}}=-2.37V.\] The correct sequence in which the various metals are deposited at the cathode is

    A)  A, B, C, D           

    B)  A, B, C

    C)  D, C, B, A           

    D)  C, B, A

    Correct Answer: B

    Solution :

     The more the reduction potential, the more is the deposition of metals at cathode. Cation having \[E{}^\circ \]value less than - 0.83 V (reduction potential of \[{{H}_{2}}O\]) will not deposit from aqueous solution.


You need to login to perform this action.
You will be redirected in 3 sec spinner