Question

C2H5Br→C2H5OH→C2H4→C2H4I2

Answer 1

C₂H₅Br + NaOH = C₂H₅OH + NaBr

C₂H₅OH + H₂SO₄ = C₂H₄ + H₂SO₄*H₂O

C₂H₄ + I₂ = C₂H₄I₂