Question

Select the electrophiles out of the following options: h, na, Cl⁻, C₂H₅OH, alCl₃, SO₃, CN⁻, CH₃CH₂, :cCl₂, r-x?
1) h
2) na
3) Cl⁻
4) C₂H₅OH
5) alCl₃
6) SO₃
7) CN⁻
8) CH₃CH₂
9) :cCl₂
10) r-x