MCQ
The $ IUPAC$ name of $C{H_3} - C{H_2} - \mathop {\mathop {C = }\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}} C{H_2}$ is
- ✓$2- $ methylbutene $-1$
- B$3-$ methylbutene $-1$
- CVinyl methylethane
- DPropylethene $-1$
The IUPAC name is $2$ - methyl-$1$-butene.
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Here $X, Y$ are respectively
$H_2O(l) \rightarrow H^+(aq) + OH^-(aq)\,;\,\,\Delta H = 57.32\,kJ$
$H_2(g)+ \frac{1}{2} O_2(g) \rightarrow H_2O(l)\,;\,\, \Delta H=-286.20\,kJ$
The value of enthalpy of formation of $OH^-$ ion at $25\,^oC$ is : .............. $\mathrm{kJ}$