本课配套习题挑战模式1/5

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单选题
难度系数:

1.根据以下几个反应:
①Cl2+2KI=2KCl+I2
②2FeCl2+Cl2=2FeCl3
③2FeCl3+2KI=2FeCl2+2KCl+I2
④I2+SO2+2H2O=H2SO4+2HI
判断氧化性由强到弱的顺序是
A: Cl2>I2>Fe3+>SO2
B: Cl2>Fe3+>I2>SO2
C: Cl2>Fe3+>SO2>I2
D: Fe3+>I2>Cl2>SO2
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