试题与答案

碳氢钠米碳管的研制成功体现了科技的进步.用电弧法合成的纳米碳管常伴有大量的杂质碳

题型:填空题

题目:

碳氢钠米碳管的研制成功体现了科技的进步.用电弧法合成的纳米碳管常伴有大量的杂质碳纲米微粒,这种碳纳米微粒可用氧化汽化法提纯,其反应中的反应物和生成物有C、CO2、H2SO4、KCr2O、K2SO4、Cr2(SO43、H2O七种物质.

(1)请用上述物质填空,并配平化学方程式:

C+______+H2SO4═K2SO4+______+______Cr2(SO43+H2O

(2)H2SO4在反应中表现出来的性质是______

a.氧化性    b.氧化性和酸性    c.酸性    d.还原性和酸性

(3)若反应中转移了0.8mol电子,则产生气体在标准状况下的体积为______.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, C, E

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