题目内容

下列羰基亲核反应活性顺序不正确:CH2ClCHO > BrCH2CHO > CH3CH2CHO > CH2=CHCHO

A. 对
B. 错

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酮及芳香醛不与斐林试剂反应。

A. 对
B. 错

在碱的催化下,醛、脂肪族甲基酮和8个碳原子以上的环酮可与氢氰酸发生亲核加成反应

A. 对
B. 错

在碱的催化下,醛、甲基酮和8个碳原子以下的环酮可与亚硫酸氢钠发生亲核加成反应

A. 对
B. 错

A widely recognized heuristic for categorizing downstream processing operations divides them into four groups which are applied in order to bring a product from its natural state as a component of a tissue, cell or fermentation broth through a progressive improvements in purity and concentration.

A. 纯净
B. 纯度
C. 纯洁
D. 纯粹

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