将100 mL稀硝酸和稀硫酸的混合酸溶液平均分成两份。向其中一份中逐渐加入铜粉，最多能溶解9.6 g(假设此时硝酸只被还原为NO，下同)；向另一份中逐渐加入铁粉，产生气体的量随铁粉质量的变化如图所示。则下列判断中错误的是
| A．OA段产生的气体是NO，BC段产生的气体是H2 |
| B．A点对应消耗NO3-物质的量为0.1 mol |
| C．B点对应消耗铁粉的质量为8.4 g |
| D．原混合酸溶液中H2SO4的浓度为2.0 mol·L－1 |
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