(i) $$B{r_2}/Fe$$, (ii) Mg/dry ether, (iii) $$C{O_2}$$, (iv) $${H_3}{O^ \oplus }$$

(i) $$B{r_2}/Fe$$, (ii) $$N{H_3},25^\circ $$, (iiI) $$NaN{O_2},$$ dil. $$HCl,0^\circ $$ to $$5^\circ $$, (iv) $$CuCN/KCN$$, (v) dil.HCl, $$\Delta$$

(i) CH$$_3$$Cl, Anhydrous AlCl$$_3$$, (ii) $$KMn{O_4}|\mathop O\limits^\Theta H,\Delta $$, (iii) $${H_3}\mathop O\limits^ \oplus $$

(i) CH$$_3$$COCl, Anhydrous AlCl$$_3$$, (ii) Br$$_2$$, NaOH, (iii) $${H_3}{O^ \oplus }$$

SOCl₂, LiAlH₄, ethylene glycol.

SOCl₂, KMnO₄, NH₂NH₂

SnCl₂, HCl, Na₂SO₃

HCl, SnCl₂ ethylene glycol