MCQ
Electrolysis of aqueous $HCl$ solution produces
- A${H_2}$ gas at the anode
- ✓${H_2}$ gas at the cathode
- C$C{l_2}$ gas at the cathode
- D$C{l_2}$ and ${O_2}$ gases both at the anode
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(Given : atomic number $Sm =62 ; Eu =63 ; Tb =65 ; Gd =64, Pm =61 \text { ) }$
$A.$ $Sm$ $B.$ $Eu$ $C.$ $Tb$ $D.$ $Gd$ $E.$ $Pm$
Choose the correct answer from the options given below:
$A^+/A = \,-\,2.93\, Volt$, $B^+/B = 0.80\,V$
$C^{+2}/C = \,-\,2.37\, Volt$, $D^{+3}/D = \,-\,0.74\,V$
Increasing order of reducing power of these metals
