QJEEM23Chace1: JEE Main 2023 Chemistry - Class 12 JEEM23Chace1 Solution: A trisubstituted compound ' ', gives neutral test positive.…

A trisubstituted compound ' $\mathrm{A}$ ', $\mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}$ gives neutral $\mathrm{FeCl}_{3}$ test positive. Treatment of compound 'A' with $\mathrm{NaOH}$ and $\mathrm{CH}_{3} \mathrm{Br}$ gives $\mathrm{C}_{11} \mathrm{H}_{14} \mathrm{O}_{2}$ , with hydroiodic acid gives methyl iodide and with hot conc. $\mathrm{NaOH}$ gives a compound $\mathrm{B}, \mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}$ . Compound 'A' also decolorises alkaline $\mathrm{KMnO}_{4}$ . The number of $\pi$ bond/s present in the compound ' $\mathrm{A}$ ' is _____________.