【題目】餐具上的油垢可以用加入洗滌劑的水洗掉,其原因是洗滌劑具有(

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】

試題分析:溶解和乳化過(guò)程都沒(méi)有新物質(zhì)生成,發(fā)生的是物理變化。氧化作用、催化作用都是在發(fā)生化學(xué)變化時(shí)才具有的,A、C錯(cuò)誤;洗滌劑能將油污分散成很小的油滴形成乳濁液,洗滌劑具有乳化功能,B正確;洗滌劑不能將油污分散成分子形成溶液,不具有溶解的功能,錯(cuò)誤。故選B

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