MCQ
The Wurtz-Fittig reaction involves condensation of
- Atwo molecules of aryl halides
- ✓one molecule of each of aryl- halide and alkyl-halide.
- Cone molecule of each of aryl-halide and phenol.
- Dtwo molecules of aralkyl-halides.
${C_6}H_5Cl + 2Na + ClC{H_3} \to \mathop {{C_6}{H_5}C{H_3}}\limits_{{\text{Toluene}}} + 2NaCl$
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$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 .......... $\%$.
