MCQ
When $Cu$ or $Zn$ added to $CuSO_4$ we get $Cu$ .It is due to
- AOxidation of $C{u^{ + 2}}$
- ✓Reduction of $C{u^{ + 2}}$
- CHydrolysis of $CuS{O_4}$
- DIonization of $CuS{O_4}$

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( $U$ : आंतरिक ऊर्जा (internal energy), $S$ : एंट्रॉपी (entropy), $p$ : दाब (pressure), $V$ : आयतन (volume), $R$ : गैस नियतांक (gas constant)
(दिया गयाः स्थिर आयतन पर गैस की मोलर ऊष्माधारिता (molar heat capacity at constant volume), $C_{V, m }$ का मान $\frac{5}{2} R$ है)
(Given ${\Delta _{fus}}H = 6\, kJ\, mol^{-1}$ at $0\,^oC$,
$C_p(H_2O, l) =75.3\, J\, mol^{-1} \, K^{-1}$ ,
$C_p(H_2O, s) = 36.8\, J\, mol^{-1} \, K^{ -1}$ )
[Atomic mass: $\mathrm{Ag}=108, \mathrm{Br}=80$ ]
