Kemija - 2011./12. ljeto - 14.

${\mathrm{C}\mathrm{H}}_2{\mathrm{C}\mathrm{l}}_2\backslash mathrm\{CH\}\_\{2\}\; \backslash mathrm\{Cl\}\_\{2\}$

${\mathrm{C}\mathrm{C}\mathrm{l}}_4\backslash mathrm\{CCl\}\_\{4\}$

$\mathrm{H}\mathrm{C}\mathrm{l}\backslash mathrm\{HCl\}$

${\mathrm{C}\mathrm{l}}_2\backslash mathrm\{Cl\}\_\{2\}$