Можно сказать :
А) атом меди
Б) молекула глюкозы
В) Атом пероксида водорода
Г) молекула железа​

Реакция Вёлера
CaC2+2H2O-->C2H2+Ca(OH)2
Реакция Зелинского
3C2H2-->(циклотримеризация)C6H6
Гидрирование
1)C6H6+3H2-->C6H12
2)C6H12+H2-->C6H14
Галогенизация
C6H14+Cl2-->C6H13Cl+HCl
Реакция Вюрца-Фиттига
C6H13Cl+2Na+CH3Cl-->C7H16+2NaCl
Крекинг
1)C7H16-->C4H10+C3H6 
Гидрирование
2)C3H6+H2-->C3H8
Галогенизация
3)C3H8+Cl2-->C3H7Cl
Реакция Вюрца-Фиттига
4)C3H7Cl+C3H7Cl+2Na-->C6H14+2NaCl
Галогенизация
C6H14+Cl2-->C6H13Cl+HCl
Реакция Вюрца
2C6H13Cl+2Na+C6H13Cl-->C12H26+2NaCl
Крекинг
C12H26-->C6H14+C6H12
Гидратация
C6H14+H2O-->C6H13OH+1/2 H2
Дегидратация
C6H13OH-->C6H12+H2O

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