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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Statement $I$ : Gallium is used in the manufacturing of thermometers.
Statement $II$ : A thermometer containing gallium is useful for measuring the freezing point ( $256 \mathrm{~K}$ ) of brine solution.
In the light of the above statement, choose the correct answer from the options given below :
$Fe|F{e^{ + 2}}\left( {0.2\,M} \right)||A{u^{ + 3}}\left( {0.02\,M} \right)|Au$, If $E_{F{e^{ + 2}}/Fe}^o = - 0.44\,V$ and $E_{Au/A{u^{ + 3}}}^o = - 1.50\,V$