试题与答案

将磁性氧化铁放入稀HNO3中可发生如下反应:3Fe3O4+28HNO3==9Fe

题型:选择题

题目:

将磁性氧化铁放入稀HNO3中可发生如下反应:3Fe3O4+28HNO3==9Fe(NO3)x+NO↑+14H2O 。下列判断合理的是[ ]

A.Fe(NO3)x中的x为2

B.反应中每生成0.2mol还原产物,就有0.6mol 电子转移

C.稀HNO3在反应中只作氧化剂

D.磁性氧化铁中的铁元素全部被氧化

答案:

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