下列物质性质比较正确的是A.熔点：CH3CH2Br > CH3CH2CH2BrB.密度:CCl4 > CBr4C.水溶性:CH3CH2OH > CH3CH2BrD.毒性:乙烯 > 苯

下列物质性质比较正确的是A.熔点：CH3CH2Br > CH3CH2CH2BrB.密度:CCl4 > CBr4C.水溶性:CH3CH2OH > CH3CH2BrD.毒性:乙烯 > 苯
下列物质性质比较正确的是
A.熔点：CH3CH2Br > CH3CH2CH2Br
B.密度:CCl4 > CBr4
C.水溶性:CH3CH2OH > CH3CH2Br
D.毒性:乙烯 > 苯

下列物质性质比较正确的是A.熔点：CH3CH2Br > CH3CH2CH2BrB.密度:CCl4 > CBr4C.水溶性:CH3CH2OH > CH3CH2BrD.毒性:乙烯 > 苯
选C
A项,熔点的比较,组成结构相似的物质,C数越多,熔沸点越高
B项,组成结构相似的物质,相对分子质量越大,密度越大,
C项,根据相似相溶原理,可知,水溶性:CH3CH2OH > CH3CH2Br
D项,苯为剧毒物质,毒性大于乙烯