Kemija - 2013./14. ljeto - 11.

${\mathrm{C}\mathrm{C}\mathrm{l}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\backslash mathrm\{CCl\}\_\{3\}\; \backslash mathrm\{COOH\}$

${\mathrm{C}\mathrm{C}\mathrm{l}}_2\mathrm{H}\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\backslash mathrm\{CCl\}\_\{2\}\; \backslash mathrm\{HCOOH\}$

${\mathrm{C}\mathrm{C}\mathrm{l}\mathrm{H}}_2\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\backslash mathrm\{CClH\}\_\{2\}\; \backslash mathrm\{COOH\}$

${\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\backslash mathrm\{CH\}\_\{3\}\; \backslash mathrm\{COOH\}$