MHTCET 20 Apr 2026 Shift 2 Paper

Concept:Electrophiles are electron-deficient species that accept an electron pair from a nucleophile.Explanation:Check each option for electron-deficient species.Option A: $\mathrm{R}-\mathrm{OH}$ and $\mathrm{NH}_{3}$ have lone pairs, so they are nucleophiles. $\mathrm{Cl}^{+}$ is an electrophile. Not only electrophiles.Option B: $\mathrm{H}_{2}\mathrm{O}$ and $\mathrm{R}_{2}\mathrm{N}^{-}$ are electron-rich nucleophiles. $\mathrm{H}_{3}\mathrm{O}^{+}$ can act as an electrophile. Not only electrophiles.Option C: $\mathrm{BF}_{3}$ has only six electrons around boron, so it is electron deficient. $\mathrm{SO}_{3}$ accepts an electron pair at sulfur. $\mathrm{NO}^{+}$ is positively charged and electron deficient. All three are electrophiles.Option D: $\mathrm{AlCl}_{3}$ is an electrophile, but $\mathrm{R}-\mathrm{NH}_{2}$ and $\mathrm{PCl}_{3}$ have lone pairs and act as nucleophiles. Not only electrophiles.Answer:$\mathrm{BF}_{3}, \mathrm{SO}_{3}, \mathrm{NO}^{+}$ (Option C)