NEET 2026 — Chemistry solution

NEET2026Chemistry

The number of chlorine atoms present in the organic products X and Y of the following reactions, respectively are :

A
3 and 3
B
6 and 6
C
6 and 3
D
3 and 6

Solution

With anhydrous AlCl $_{3}$ in dark and cold conditions, benzene undergoes electrophilic substitution and all six ring hydrogens are replaced, giving hexachlorobenzene C $_{6}$ Cl $_{6}$ (X) which contains 6 chlorine atoms.

Under UV light at 500 K, benzene undergoes free-radical addition to give 1,2,3,4,5,6-hexachlorocyclohexane C $_{6}$ H $_{6}$ Cl $_{6}$ (Y), which also contains 6 chlorine atoms.

So both X and Y contain 6 chlorine atoms each.

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