Q36 / 160 · AP EAMCET 2020 (18 Sep Shift 2) · Chemistry

Match the entries from Column I and Column II and choose the correct order. Figure

  • A
    \(\begin{array}{lll} \mathrm{A} & \mathrm{B} & \mathrm{C} \\ 3 & 2 & 1 \\ \end{array}\)
  • B
    \(\begin{array}{lll} \mathrm{A} & \mathrm{B} & \mathrm{C} \\ 1 & 2 & 3 \\ \end{array}\)
  • Correct answer
    C
    \(\begin{array}{lll} \mathrm{A} & \mathrm{B} & \mathrm{C} \\ 3 & 1 & 2 \end{array}\)
  • D
    \(\begin{array}{lll} \mathrm{A} & \mathrm{B} & \mathrm{C} \\ 2 & 1 & 3 \end{array}\)

Solution

The correct matching between Column I and Column II is (A) Leclanche cell-anode reaction : \(\mathrm{Zn} \longrightarrow \mathrm{Zn}^{2+}+2 e^{-}\) Cathode : \(\mathrm{MnO}_2+\mathrm{NH}_4^{+}+e^{-} \longrightarrow \mathrm{MnO}(\mathrm{OH})+\mathrm{NH}_3\) (B) Fuel cell : \(2 \mathrm{H}_2+\mathrm{O}_2 \longrightarrow \mathrm{H}_2 \mathrm{O}+\) Energy (gets converted into electrical energy). (C) Ni-Cd cell : Rechargeable (secondary) cell. Hence, option (c) is correct.

Hence, the correct answer is option: 'C'.

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