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[2012·德州一模](12分)有色金属冶炼厂剩下的废料中,含有金、银、铂、钯等贵重金属,为提高经济效益,某科技小组要从废料中提取金、银、铂、钯等贵重金属,步骤设计如下图甲,试回答下列问题: (1)实验步骤中,浓硫酸浸煮产生尾气的主要成分是 (填化学式),量NaOH溶液进行尾气处理,发生反应的离子方程式为 。 (2)在实验室中操作I中需要的玻璃仪器有 。 (3)实验过程中所需的氯气在制备中,会混有杂质(H 2 O和HCl),科技小组设计了图乙所示的实验装置,证明水蒸气和HCl杂质的存在,请根据设计示意图完成下列有关问题: ①A是氯气发生装置,其中发生的离子方程式为 。 ②实验装置的接口顺序为:b接 , 接 , 接a。 ③装置D的作用是 。 ④在实验中,一组员认为该实验设计存在缺陷:不能证明最终通入AgNO 3 溶液的气体只有一种。为了确保实验结论的可靠性,证明最终通入AgNO 3 溶液的气体只有一种,他们提出在某两个装置之间再加装置E。如右图所示。你认为装置E应加在 之间(填装置字母序号),并且在广口瓶中放入 (填写所有试剂或用品名称)。
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举一反三
【单选题】不等式|x-1|>0的解集是
A.
无解
B.
全体实数
C.
{x∣x>1}
D.
{x∣ }
【单选题】听力原文:M: British English and American English are really about the same, aren't they? W: I don't think so. It seems that some of the spellings are different. M: You're right, Nina. Words like 'theater'...
A.
British English and American English are same in meaning.
B.
Not all the spellings in British English and American English are the same.
C.
British English is easier than American English.
【单选题】不等式 x^2-5x-6≤0 的解集是( )
A.
{x∣-2≤x≤3}
B.
{x∣-1≤x≤6}
C.
{x∣-6≤x≤1}
D.
{x∣x≤-1或x≥6}
【单选题】不等式∣3-2x∣+1<0的解集是( )
A.
R
B.
(1,2)
C.
(-∞,-3)∪(1,+∞)
D.
【单选题】Which of the following statements is CORRECT according to the first paragraph?
A.
American workers can get equal amount of benefits in less working time compared to Europeans.
B.
American workers can get more benefits in less working time compared to Europeans.
C.
The amount of benefits American unemployed get is in proportion to their working time.
D.
The time interval American unemployed get benefits is smaller compared to Europeans.
【单选题】80%~95%的婴儿生后动脉导管解剖上关闭的时间为
A.
生后1~2天
B.
生后1~2周
C.
生后1~2个月
D.
生后3~12个月
E.
生后满1岁后
【单选题】不等式 x 2 -2x +1≥0的解集是( )
A.
{x∣x≠1}
B.
R
C.
{x∣-1﹤x﹤1}
D.
【简答题】The leader of the American Transcendentalism is _________. A.Henry David Thoreau B.Ralph Waldo Emerson C.Henry James
【单选题】听力原文:M: British English and American English are really about the same, aren't they? W: I don't think so. It seems that some of the spellings are different. M: You're right, Nina. Words like 'theater'...
A.
British English and American English are quite different.
B.
Not all the spellings in British English and American English are the same.
C.
British English is easier than American English.
【单选题】80%的婴儿动脉导管解剖上关闭的时间是在生后
A.
1个月
B.
3个月
C.
5个月
D.
7个月
E.
12个月
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