The correct sequence of correct reagents for the following transformation is :-
Question:

The correct sequence of correct reagents for the following transformation is :-

  1. (i) $\mathrm{Fe}, \mathrm{HCl}$

    (ii) $\mathrm{Cl}_{2}, \mathrm{HCl}$,

    (iii) $\mathrm{NaNO}_{2}, \mathrm{HCl}, 0^{\circ} \mathrm{C}$

    (iv) $\mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$

  2. (i) $\mathrm{Fe}, \mathrm{HCl}$

    (ii) $\mathrm{NaNO}_{2}, \mathrm{HCl}, 0^{\circ} \mathrm{C}$

    (iii) $\mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$

    (iv) $\mathrm{Cl}_{2}, \mathrm{FeCl}_{3}$

  3. (i) $\mathrm{Cl}_{2}, \mathrm{FeCl}_{3}$

    (ii) $\mathrm{Fe}, \mathrm{HCl}$

    (iii) $\mathrm{NaNO}_{2}, \mathrm{HCl}, 0^{\circ} \mathrm{C}$

    (iv) $\mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$

  4. (i) $\mathrm{Cl}_{2}, \mathrm{FeCl}_{3}$

    (ii) $\mathrm{NaNO}_{2}, \mathrm{HCl}, 0^{\circ} \mathrm{C}$

    (iii) $\mathrm{Fe}, \mathrm{HCl}$

    (iv) $\mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$


Correct Option: , 3

Solution:

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