利用下列实验装置进行的相应实验,不能达到实验目的的是(   ) A

利用下列实验装置进行的相应实验,不能达到实验目的的是(   )

A.用图1所示装置可制取氨气

B.用图2所示装置可分离CH3CH2OHCH3COOC2H5混合液

C.用图3所示装置可制取乙烯并验证其易被氧化

D.用图4所示装置可说明浓H2SO4具有脱水性、强氧化性,SO2具有漂白性、还原性

答案

【答案】B

【解析】

试题分析:A、可用浓氨水和生石灰来制取氨气,A正确;B、乙醇与乙酸乙酯二者互溶,不能用分液漏斗分离,B错误;C、乙醇和浓硫酸共热过程中会产生乙烯、二氧化硫、乙醚等物质。前两者均可使酸性高锰酸钾溶液褪色,在进入酸性高锰酸钾溶液之前用碱液除去二氧化硫,即可验证乙烯被氧化,C正确;D、浓硫酸使蔗糖变黑说明浓硫酸具有脱水性,产生使品红溶液褪色的气体说明浓硫酸具有强氧化性,同时也证明二氧化硫的漂白性,使酸性高锰酸钾溶液褪色说明二氧化硫具有还原性,D正确,故选B

考点:考查了化学实验方案的设计与评价的相关知识。

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