MCQ
Formic acid can reduce
- ATollen's reagent
- BMercuric chloride
- C$KMn{O_4}$
- ✓All of these
Fehling solution -
$HCOOH + 2CuO \to C{O_2} + {H_2}O + \mathop {C{u_2}O}\limits_{{\text{(Red}}\,{\text{ppt}})} $
Mercury chloride -
$2HCOOH + 2HgC{l_2} \to 2C{O_2} + 4HCl + \mathop {2Hg}\limits_{{\text{(Black)}}} $
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$Z{n^{2 + }} + 2{e^ - } \to Zn$ ; $E = - 7.62\,\,V,$
$F{e^{2 + }} + 2{e^ - } \to Fe$ ; $E = - 7.81\,\,V$
The emf of the cell $F{e^{2 + }} + Zn \to Z{n^{2 + }} + Fe$ is ............ $\mathrm{V}$