In the electrolysis of an aqueous $Ni(NO_3)_2$ solution using $Ni$ electrodes,upon passing $1$ equivalent of charge,the mass of the cathode $(Ni = 59)$ changes by:
- AIncreases by $29.5 \ g$
- BIncreases by $59 \ g$
- CDecreases by $127 \ g$
- DNone of these
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| Column $I$ (Reduction process) | Column $II$ (Charge required) |
|---|---|
| $(a)$ $1$ mol of $MnO_4^-$ to $Mn^{2+}$ | $(p)$ $193000$ $C$ |
| $(b)$ $1$ mole of $Cr_2O_7^{2-}$ to $Cr^{3+}$ | $(q)$ $289500$ $C$ |
| $(c)$ $1$ mole of $Sn^{4+}$ to $Sn^{2+}$ | $(r)$ $482500$ $C$ |
| $(d)$ $1$ mole of $Al^{3+}$ to $Al$ | $(s)$ $579000$ $C$ |
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