Cho các este: etyl fomat (1), vinyl axetat (2), triolein (3)

* Hướng dẫn giải

Chọn B.

(1) $HCOO{C}_2{H}_5+NaOH\to HCOONa+C_2{H}_{5}OH$

(2) $C{H}_{3}COOCH=C{H}_2+NaOH\to C{H}_{3}COONa+C{H}_{3}CHO$

(3) ${\left(C_{17}{H}_{33}COO\right)}_3{C}_3{H}_5+NaOH\to C_{17}{H}_{33}COONa+C_3{H}_5{\left(OH\right)}_3$

(4) $C{H}_2=CH-COOC{H}_3+NaOH\to C{H}_2=CH-COONa+C{H}_{3}OH$

(5) $C{H}_{3}COO{C}_6{H}_5+NaOH\to C{H}_{3}COONa+C_6{H}_{5}ONa+H_{2}O$