MCQ
the hydrogen indicated by arrow will be easily removed as


- ✓$H^+$
- B${H^\circleddash }$
- C${H^ \bullet }$
- D${H^{ - 2}}$


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${B{orax}}\xrightarrow{X}{H_3}B{O_3}\xrightarrow{\Delta }{B_2}{O_3}\xrightarrow[\Delta ]{Y}B$,
$X$ and $Y$ are respectively
$CO + \frac{1}{2}{O_2} \to C{O_2};\,\Delta H = - 24\,kJ$ The heat of formation of $C{O_2}$ is .....$kJ$