Question

CH3-CH3->CH3-CH2CL->C4H10->CH2=CH-CH2-CH3

Answer 1

СН3-СН3+Сl2= CH3-CH2-Cl + HCl (hv)
CH3-CH2-Cl+2Na+ Cl-CH2-CH3 -> C4H10+2NaCl
C4H10 -> CH2=CH-CH2-CH3 + H2 (t, kat)