MCQ
Which one of the following series contain's electrophiles only ?
- A$H_2O,\,\,SO_2,\,\,H_3{O^ \oplus }$
- B$NH_3,\,\,H_2O,\,\,AlCl_3$
- ✓$AlCl_3,\,\,SO_3,\,\,\mathop N\limits^ \oplus{O_2}$
- D$H_2O,\,\,C\mathop l\limits^ \oplus ,\,\,NH_3$

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portion which can be shown as: