下列叙述正确的是( ) A.乙烯和苯都能使溴水褪色,褪色的原理相同

下列叙述正确的是(  )

A.乙烯和苯都能使溴水褪色,褪色的原理相同

B.乙醇、乙酸、乙酸乙酯都能发生取代反应

C.淀粉、油脂、蛋白质的水解产物互为同分异构体

D.纤维素、聚乙烯、光导纤维都属于高分子化合物

答案

解析:乙烯与溴水发生加成反应,苯萃取溴水中的溴而使溴水层褪色,原理不同,A项错误;酸与醇的酯化、乙酸乙酯的水解都是取代反应,B项正确;淀粉水解最终产物是葡萄糖,油脂水解生成高级脂肪酸和甘油,蛋白质水解最终产物是氨基酸,这些产物不可能互为同分异构体,C.项错误;光导纤维的成分是二氧化硅,不是高分子化合物,D项错误。

答案:B

点拨:本题考查物质分类、常见有机物的性质、同分异构体等。难度较小。

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