MCQ
Among the following, the weakest Lewis base is
- A${H^ - }$
- B$O{H^ - }$
- ✓$C{l^ - }$
- D$HCO_3^ - $
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(Note : consider that an appropriate indicator is used)
$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 .......... $\%$.