MCQ
Aqua regia is a mixture of
- ✓$3HCl + 1HN{O_3}$
- B${H_3}P{O_4} + {H_2}S{O_4}$
- C$3HN{O_3} + 1HCl$
- D$HCl + C{H_3}COOH$
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What is $A$
$CH_3OH(l)+ \frac{3}{2} O_2 (g) $$\rightarrow CO_2 (g)+ 2H_2O(l)$
At $298\, K$ standard Gibb's energies of formation for $CH_3OH(l),H_2O(l)$ and $CO_2 (g)$ are $-166.2,-237.2$ and $-394.4\, kJ\,mol^{-1}$ respectively. If standard enthalpy of combustion of methonal is $-726 \,kJ\, mol^{-1},$ efficiency of the fuel cell will be .......... $\%$.