选择题 根据“绿色化学”的思想，某化学家设计了下列化学反应步骤：?
①CaBr2+H2O![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 51px; HEIGHT: 30px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/qo5jip5rqpz.png\">CaO+2HBr
②2HBr+Hg![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 51px; HEIGHT: 30px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/cembnufojjy.png\">HgBr2+H2↑
③HgBr2+CaO![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 31px; HEIGHT: 25px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/3nehscwwtzr.png\">HgO+CaBr2
④2HgO![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 31px; HEIGHT: 32px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/vviis2nrzwq.png\">2Hg+O2↑
该方案的目的是为了制备 [???? ]
A．HBr?????
B．CaO??????
C．H2??????
D ．Hg
选择题 根据“绿色化学”的思想，某化学家设计了下列化学反应步骤：?
①CaBr2+H2O![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 51px; HEIGHT: 30px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/qo5jip5rqpz.png\">CaO+2HBr
②2HBr+Hg![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 51px; HEIGHT: 30px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/cembnufojjy.png\">HgBr2+ H2↑
③HgBr2+CaO![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 31px; HEIGHT: 25px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/3nehscwwtzr.png\">HgO+CaBr2
④2HgO![]()
600)makesmallpic(this,600,1800);\' style=\"WIDTH: 31px; HEIGHT: 32px; VERTICAL-ALIGN: middle\" src=\"http://www_php168_com/91files/2016060707/vviis2nrzwq.png\">2Hg+O2↑
该方案的目的是为了制备 [???? ]
A．HBr?????
B．CaO??????
C．H2??????
D．Hg
本题答案：C
本题解析：
本题所属考点：【物质制备实验方案的设计】
本题难易程度：【简单】
By his claw, you may know the lion. 要知狮子看脚爪。
