脑白金中主要成分的结构简式为 。下列对脑白金主要成分的推断错

脑白金中主要成分的结构简式为

。下列对脑白金主要成分的推断错误的是

A.其分子式为C13H16N2O2             B.它能水解得到乙酸

C.该物质是苯的同系物                     D.该物质属于蛋白质

答案

CD  解答此题宜采用先定性后定量的分析方法.由脑白金中主要成分的结构简式可知:其分子中除含C、H元素外,还含有N、O元素,故脑白金一定不是苯的同系物,C项错误;由于蛋白质是高分子化合物,而脑白金中主要成分属于小分子化合物,故D项也错误;水解断开的是中的碳氮键,变为CH3COOH,故B项正确;此时,由脑白金主要成分中C、H、N、O的个数,知A项是正确的,故C、D项符合题意.

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