MCQ
With cold and dilute sodium hydroxide fluorine reacts to give
- ✓$NaF$ and $O{F_2}$
- B$NaF + {O_3}$
- C${O_2}\;{\rm{and}}\;{O_3}$
- D$NaF + {O_2}$
$2NaOH + 2{F_2} \to 2NaF + O{F_2} + {H_2}O$
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Statement $I$: Aniline reacts with con. $\mathrm{H}_2 \mathrm{SO}_4$ followed by heating at $453-473 \mathrm{~K}$ gives $\mathrm{p}$ aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'.
Statement $II$: In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the $\mathrm{AlCl}_3$ catalyst. Due to this, nitrogen of aniline aquires a positive charge and acts as deactivating group.
In the light of the above statements, choose the correct answer from the options given below :

