MCQ
The $IUPAC$ name of $(CH_3)_3C \, CH_2CH_2Cl$ is
- A$2, 2-$ Dimethyl $-4-$ chloro butane
- ✓$1-$ Chloro $-3, 3-$ dimethylbutane
- C$4-$ Chloro $-2, 2-$ dimethyl butane
- Dnone of these
On $3^{rd}$ carbon atom two methyl substituent are attached.
So its name is $1$-chloro-$3,3$-dimethyl butane.
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Step $I\,\,:$ ${H_2}O(g)\, \to \,H(g)\, + \,OH(g)\,;$ $\Delta H = 498\,kJ\,mol^{-1}$
Step $II\,\,:$ $OH(g)\, \to \,H(g)\, + \,O(g)\,;$ $\Delta H = 428\,kJ\,mol^{-1}$
The bond enthalpy of the $O-H$ bond is....$kJ\,mol^{-1}$
$X$ and $Y$ respectively are :-

[Given : $R_{\mathrm{H}}\left(\right.$ Rydberg constant) $=2.18 \times 10^{-18} \mathrm{~J}$.
$h($ Plank's constant $)=6.6 \times 10^{-34}$ J.s. $]$