MCQ
The strongest base from the following species is
- ✓$N{H^{2 - }}$
- B$O{H^ - }$
- C${O^{2 - }}$
- D${S^{2 - }}$
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| Substance | $H _{2}$ | $C ($ graphite $)$ | $C _{2} H _{6}( g )$ |
| $\frac{\Delta_{ C } H ^{\Theta}}{ kJmol ^{-1}}$ | $-286.0$ | $-394.0$ | $-1560.0$ |
The enthalpy of formation of ethane is ........ .