MCQ
The $IUPAC$ name of $[Cr(en)_3]Cl_3$ is
- Atriethylene diaminechromium $(III)$ chloride
- Btris(ethylenediammine)chromium $(III)$ chloride
- ✓tris(ethylenediamine)chromium $(III)$ chloride
- Dtris(ethylene diamine)chomium $(III)$ chlorido
$x+4(-1)=-2$
$x=+2$
$\Rightarrow 12-2+6 \times 2$
$\Rightarrow 10+12=22(\mathrm{EAN})$
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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....$kJ\,mol^{-1}$

