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Câu hỏi: Cho các este : etyl fomat (1), vinyl axetat (2), triolein (3), metyl acrylat (4), phenyl axetat (5). Dãy gồm các este đều phản ứng được với dung dịch NaOH (đun nóng) sinh ra ancol là
A. (2), (3), (5).
B. (3), (4), (5).
C. (1), (3), (4).
D. (1), (2), (3).
A. (2), (3), (5).
B. (3), (4), (5).
C. (1), (3), (4).
D. (1), (2), (3).
(1) $HCOO{{C}_{2}}{{H}_{5}}+NaOH\Rightarrow HCOONa+{{C}_{2}}{{H}_{5}}OH$
(2) $C{{H}_{3}}COOCH=C{{H}_{2}}$ $+NaOH\Rightarrow C{{H}_{3}}COONa+C{{H}_{3}}CHO$
(3) ${{\left( {{C}_{17}}{{H}_{33}}COO \right)}_{3}}{{C}_{3}}{{H}_{5}}+NaOH\Rightarrow {{C}_{17}}{{H}_{33}}COONa+{{C}_{3}}{{H}_{5}}{{\left( OH \right)}_{3}}$
(4) $C{{H}_{2}}=CH-COOC{{H}_{3}}+NaOH\Rightarrow C{{H}_{2}}=CH-COONa+C{{H}_{3}}OH.$
(5) $C{{H}_{3}}COO{{C}_{6}}{{H}_{5}}+NaOH\Rightarrow C{{H}_{3}}COONa+{{C}_{6}}{{H}_{5}}ONa+{{H}_{2}}O$
(2) $C{{H}_{3}}COOCH=C{{H}_{2}}$ $+NaOH\Rightarrow C{{H}_{3}}COONa+C{{H}_{3}}CHO$
(3) ${{\left( {{C}_{17}}{{H}_{33}}COO \right)}_{3}}{{C}_{3}}{{H}_{5}}+NaOH\Rightarrow {{C}_{17}}{{H}_{33}}COONa+{{C}_{3}}{{H}_{5}}{{\left( OH \right)}_{3}}$
(4) $C{{H}_{2}}=CH-COOC{{H}_{3}}+NaOH\Rightarrow C{{H}_{2}}=CH-COONa+C{{H}_{3}}OH.$
(5) $C{{H}_{3}}COO{{C}_{6}}{{H}_{5}}+NaOH\Rightarrow C{{H}_{3}}COONa+{{C}_{6}}{{H}_{5}}ONa+{{H}_{2}}O$
Đáp án C.