09.04.2017 Views

30 đề thi học sinh giỏi môn hóa học lớp 10 & 11 của các trường chuyên khu vực duyên hải đồng bằng bắc bộ có đáp án

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2.<br />

CH 2 OH<br />

CH 3 CHO + 4 HCHO + NaOH HO CH 2 C CH 2 OH HCOONa<br />

CH 2 OH<br />

(A)<br />

(Hoặc:<br />

CH 2 OH<br />

OH<br />

CH 3 CHO + 3HCHO HO CH 2 C CHO<br />

CH 2 OH<br />

CH 2 OH<br />

CH 2 OH<br />

HOCH 2 C CHO HCHO NaOH HOCH 2 C CH 2 OH HCOONa<br />

CH 2 OH<br />

CH 2 OH<br />

(A) )<br />

CH 2 OH<br />

CH 2 Br<br />

HOCH 2 C CH 2 OH 4 KBr 4H 2 SO 4 BrCH 2 CCH 2 Br 4KHSO 4 4H 2 O<br />

CH 2 OH<br />

CH 2 Br<br />

CH 2 Br<br />

BrCH 2 CCH 2 Br 2 Zn 2 ZnBr 2<br />

CH 2 Br<br />

(B)<br />

Câu 8:<br />

Ph<br />

2PhCHO NaCN OH<br />

1.<br />

Ph-CO-CHOH-Ph HNO 3<br />

CH 3 COOH Ph-CO-C-Ph<br />

Ph- C- C-OH<br />

(A)<br />

(B) O<br />

O O<br />

Ph<br />

Ph<br />

2.<br />

Ph- C - C- OH<br />

O O<br />

H +<br />

Ph- C - C- OH<br />

HO O (C)

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