The correct sequence of reagents used in the preparation
Question:

The correct sequence of reagents used in the preparation of 4 -bromo-2-nitroethyl benzene from benezene is :

  1. $\mathrm{CH}_{3} \mathrm{COCl} / \mathrm{AlCl}_{3}, \mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{Zn} / \mathrm{HCl}$

  2. $\mathrm{CH}_{3} \mathrm{COCl} / \mathrm{AlCl}_{3}, \mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}, \mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}$

  3. $\mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{CH}_{3} \mathrm{COCl} / \mathrm{AlCl}_{3}, \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{Zn} / \mathrm{HCl}$

  4. $\mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{Br}_{2} / \mathrm{AlCl}_{3}, \mathrm{CH}_{3} \mathrm{COCl} / \mathrm{AlCl}_{3}, \mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$


Correct Option:

Solution:

A certain orbital has $\mathrm{n}=4$ and $\mathrm{m}_{\mathrm{L}}=-3$. The number of radial nodes in this orbital is _________ (Round off to the Nearest Integer).

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