78. (v16-130-18_Dibromalkanga oyuvchi kaliyning spirtdagi eritmasi tasir ettirilganda
47,6 g kaliy bromid olindi. Agar dastlabki dibromalkanning hosil bolgan alkindan massa farqi 42,5 g ga teng bolsa, alkinni toping, (q = 80%)
Р›)РЎСЃР§8 B)C4H6 C)C2H2 D)C3H4