MCQ
The aqueous solution of $CuCrO_4$ is green because it contains
- Agreen $Cu^{2+}$ ions
- Bgreen $CrO_4^{2-}$ ions
- Cblue $Cu^{2+}$ ions and green $CrO_4^{2-}$ ions
- ✓blue $Cu^{2+}$ ions and yellow $CrO_4^{2-}$ ions
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(Given: $\Delta H _{\text {vap }}$ for water at $373\, K =41\, kJ / mol$, $\left. R =8.314\, JK ^{-1} mol ^{-1}\right)$
$Ni^{2+} | Ni = -0.25\, V$
$Cu^{2+} | Cu = 0.34\, V$
$Ag^+ | Ag = 0.80\, V$
$Zn^{2+} | Zn = -0.76\, V$
Which of the following reactions under standard condition will not take place in the specified direction