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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Assertion $(A):$ The ionic radii of $O ^{2-}$ and $Mg ^{2+}$ are same.
Reason $( R )$ : Both $O ^{2-}$ and $Mg ^{2+}$ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below
In which of the following pair above statement is $NOT$ $CORRECT$ ?