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Verified answer

C₂H₆ + Cl₂ --> C₂H₅Cl + HCl (hv)
2C₂H₅Cl + 2Na ---> CH₃-CH₂-CH₂-CH₃ + 2NaCl
CH₃-CH₂-CH₂-CH₃ ---> CH₃-CH=CH-CH₃ + H₂ (kt=Ni,t)
CH₃-CH=CH-CH₃ + H₂O ---> CH₃-CH(OH)-CH₂-CH₃
CH₃-CH(OH)-CH₂-CH₃ + HCl --> CH₃-CH(Cl)-CH₂-CH₃ + H₂O (Kt=H₂SO₄)