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【单选题】
前几年，部分巨能钙被检出含有双氧水，而双氧水有致癌性，可加速人体衰老。因此卫生部加紧调查巨能钙。下列有关说法错误的是( )A.
H 2 O 2 、Na 2 O 2 都属于过氧化物，都存在共价键
B.
双氧水是绿色氧化剂，可作医疗消毒剂
C.
H 2 O 2 既有氧化性，又有还原性，与Cl 2 、KMnO 4 反应是表现H 2 O 2 的氧化性
D.
H 2 O 2 做漂白剂是利用其氧化性，漂白原理与HClO类似，与SO 2 不同
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