MCQ
Alcoholic solution of $KOH$ is used for
- ADehydration
- BDehydrogenation
- ✓Dehydrohalogenation
- DDehalogenation
In alcoholic $KOH$ alkoxide ions $(R{O^ - })$ are present which is a strong base. They abstract proton from ?-carbon of alkyl halide and favours elimination reaction
$\mathop {ROH}\limits_{{\rm{Alcohol}}} + KOH \to \mathop {ROK + {H_2}O}\limits_{{\rm{Potassium \,alkoxide}}} $
$ROK \to \mathop {R{O^ - }}\limits_{{\rm{Alkoxide \,ion}}} + {K^ + }$
$R{O^ - } + H - \mathop {C{H_2}}\limits^\beta - \mathop {C{H_2}}\limits^\alpha - Br \to ROH + C{H_2} = C{H_2} + Br$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion $A$ : Thin layer chromatography is an adsorption chromatography.
Reason $R$: A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent. In the light of the above statements, choose the correct answer from the options given below.
$SO_2Cl_2(g) \rightleftharpoons SO_2(g) + Cl_2(g)$ , what is the temperature at which $\frac{{{K_p}(atm)}}{{{K_c}(M)\,}} = \frac{1}{3}$ ? ......$K$