甘肃省兰州第一中学2019届高三化学上学期期中试题.doc

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1 -甘肃省兰州第一中学 2019 届高三化学上学期期中试题7化学与社会生活密切相关。下列说法正确的是A自来水厂用明矾净水,用 Fe2(SO4)3或 CuSO4均能代替明矾净水B根据是否能产生丁达尔效应可以将分散系分为溶液、浊液和胶体C晶体硅有半导体性质,所以可以制造光导纤维D有一种新发现的固态碳的结构称为“纳米泡沫” ,外形类似海绵,密度小且有磁性,这种碳与金刚石互为同素异形体8设 NA为阿伏加德罗常数的数值,下列说法不正确的是A23g Na 与 O2充分反应生成 Na2O 和 Na2O2的混合物,消耗 O2的分子数 N(O 2)的范围为:0.25 NAC6H5OHC向含有 ZnS 和 Na2S 的悬浊液中滴加CuSO4溶液生成黑色沉淀 Ksp(CuS)”或“”或“ (1 分) SSi(2 分) SiO2是原子晶体,融化时需破坏共价键,干冰是分子晶体,融化时需破坏范德华力,共价键的键能远大于范德华力,所以二氧化硅的熔点远高于干冰晶体(2 分) (3)PCl 3(1 分) 三角锥形(1 分)- 9 -(4)sp 3 (1 分) (1 分)(5) CSiCSi(2 分) (2 分)36.(15 分)(1)消去反应(1 分) 硝基、氯原子(2 分)(2) (2 分) H 2O(1 分)(3) (2 分) (4) 10(2 分) 或 (2 分)(5) (3 分)

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