Alkyl Halides and Aryl HalidesMedium
Question
Correct statements regarding alkyl halides ( $R - X$ ) among the following are:
Options
A.Alcohol being less polar solvent as compared to water, alcoholic KOH favours elimination reaction with $R - X$.
B.
Order of reactivity towards $S_{N}1$ mechanism is
$C_{6}H_{5} - {CH}_{2} - Cl > C_{6}H_{5} - CHCl - C_{6}H_{5}$.
C.Non substituted aryl halides exhibit properties similar to alkyl halides.
D.Vinyl chloride is an example of haloalkene and allyl chloride is an example of haloalkyne.
Solution
Sol. [Key Concept: Evaluate each statement: alcoholic KOH favours elimination; compare Ar–Cl vs R–Cl reactivity/preparation.]
Ar-Cl and R-Cl shows different chemical properties
Rate of $S_{N}\ ^{1} \propto$ stability of first formed carbocation
Water is more polar than alcohol
Vinyl alcohol, allyl alcohol, both are alkene unsaturated alcohols
Phenol does not give $Ph - Cl$ with ${SOCl}_{2}$.
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