MCQ
Which is the strongest acid ($pk_a$ value is given)?
- ✓$HCOOH\, [3.77]$
- B$C_6H_5COOH\, [4.22]$
- C$CH_3COOH\, [4.7]$
- D$CH_3CH_2COOH \,[4.88]$
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Statement $I$: Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.
Statement $II$: $\mathrm{AlCl}_3$ upon hydrolysis in acidified aqueous solution forms octahedral $\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ ion.
In the light of the above statements, choose the correct answer from the options given below :
$(I)$ gauche conformation of $1, 2$ -dibromoethane
$(II)$ anti conformation of $1, 2$ -dibromoethane
$(III)$ trans- $1, 4$ -dibromocyclohexane
$(IV)$ cis- $1, 4$ -dibromocyclohexane
$(V)$ tetrabromomethane
$(VI)$ $1, 1$ -dibromocyclohexane