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【題目】下列溶液中,溶質(zhì)是液體的是(

A.醫(yī)用葡萄糖溶液 B.20%的氫氧化鈉溶液

C.75%的消毒酒精 D.0.9%的生理鹽水

【答案】C

【解析】

試題分析:溶質(zhì)可以是固體、液體、氣體,溶劑只能是液體,當兩種液體相互溶解時,以量多的為溶劑,量少的為溶質(zhì);如果兩種液體中有水,則不論水量的多少,水都是溶劑。A.醫(yī)用葡萄糖溶液是固體葡萄糖溶于水形成的,溶質(zhì)是固體葡萄糖,錯誤;B.氫氧化鈉在常溫下是固體,氫氧化鈉溶液中,溶質(zhì)是固體氫氧化鈉,故B錯誤;C.75%的消毒酒精是酒精溶于水水形成的,其中酒精占了75%,水占了25%,酒精是溶劑,酒精在常溫下是液體,故正確;D.0.9% 的生理鹽水是食鹽的水溶液,食鹽是溶質(zhì),食鹽在常溫下是固體,D錯誤。故選C

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