MCQ
The only $o, p-$ directing group which is deactivating in nature is
- A$ - N{H_2}$
- B$ - OH$
- ✓$ - X$ (halogens)
- D$ - R$ (alkyl groups)
o. p. directing groups are as follow :
$ - C{H_3},{C_2}{H_5}( - R), - N{H_2}, - OH$, halogens $(Cl,\,Br,\,I)$.
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Statement $I:$
In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. $HCl + ZnCl _{2}$, known as Lucas Reagent.
Statement $II :$
Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.
In the light of the above statements, choose the most appropriate answer from the options given below :
Statement $I :$ The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement $II :$ The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements, choose the most appropriate answer from the options given below :