MCQ
$\ce{K2CS3}$ can be called :
- APotassium Sulphocyanide
- BPotassium Thiocarbide
- ✓Potassium Thiocarbonate
- DPotassium Thiocyanate
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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....$kJ\,mol^{-1}$
Statement $I$: Nitration of benzene involves the following step -
(Image)
Statement $II$: Use of Lewis base promotes the electrophilic substitution of benzene.
In the light of the above statements, choose the most appropriate answer from the options given below: