MCQ
For an aqueous solution, the characteristic species of acid is
- ✓${H^ + }$ion
- B${H_3}{O^ + }$ion
- C${H_2}^ + $ion
- D${H_4}{O^ + }$ion
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$\mathop {Al}\limits_{metal} \xrightarrow[{(aq.)}]{{HCl}}'X' + Gas\,'P'$
$\mathop {Al}\limits_{metal} \xrightarrow[{ + {H_2}O}]{{NaOH\,(aq.)}}'Y' + Gas\,'Q'$
$N{O_2}$, $S{F_4}$ , $PF_6^ - $
Assertion $A$ :$[6]$ Annulene.$[8]$ Annulene and cis - $[10]$ Annulene, are respectively aromatic, not-aromatic and aromatic.
Reason $R$ : Planarity is one of the requirements of aromatic systems.
In the light of the above statements, choose the most appropriate answer from the options given below.