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【题目】餐具上的油垢可以用加入洗涤剂的水洗掉,其原因是洗涤剂具有(

A、氧化作用 B、乳化功能

C、催化作用 D、溶解油垢的功能

【答案】B

【解析】

试题分析:溶解和乳化过程都没有新物质生成,发生的是物理变化。氧化作用、催化作用都是在发生化学变化时才具有的,A、C错误;洗涤剂能将油污分散成很小的油滴形成乳浊液,洗涤剂具有乳化功能,B正确;洗涤剂不能将油污分散成分子形成溶液,不具有溶解的功能,错误。故选B

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