下列各组性质比较中,正确的是(     ) ①酸性:HClO4>HBrO4>HIO4 

下列各组性质比较中,正确的是(     )

①酸性:HClO4>HBrO4>HIO4                       ②碱性:Ba(OH)2>Mg(OH)2>Be(OH)2

③非金属性:F>C>O                 ④氧化性:LiNaK

⑤气态氢化物沸点:HFHCl

  A.①②③         B.①②⑤        C.②③④          D.①②④⑤

答案

B

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