某兴趣小组的学生根据活泼金属Mg与CO2 发生的反应,推测活泼金属钠也能与CO2

题型:实验题

问题:

某兴趣小组的学生根据活泼金属Mg与CO2 发生的反应,推测活泼金属钠也能与CO2发生反应,因此实验小组用下列装置进行“钠与二氧化碳反应”的实验探究(尾气处理装置已略去)。

已知;常温下,CO能使一些化合物中的金属离子被还原。

例如:PdCl2+CO+ H2O=Pd↓+CO2+2HCl反应生成黑色的金属钯,此反应也可用来检测微量CO的存在。请

回答下列问题:

(1)通常实验室制取CO2气体的离子方程式是____________,为了使制气装置能“随开随用,随关随停”,上图A处应选用的装置是_________(填写“I”“Ⅱ”或 “Ⅲ”)。若要制取干燥、纯净的CO2气体,装置B中应盛放的试剂是___________溶液,装置C中应盛放的试剂是____________。

(2)假设CO2气体为足量,在实验过程中分别产生以下两种不同情况,请分析并回答问题:

①若装置F中溶液无明显变化,装置D中生成两种固体物质,取少量固体生成物与盐酸反应后,有能使澄清石灰水变浑浊的气体放出,则钠与二氧化碳反应的化学方程式是____________。

②若装置F中有黑色沉淀生成,装置D中只生成一种固体物质,取少量该固体与 盐酸反应后,也有能使澄清石灰水变浑浊的气体放出,则钠与二氧化碳反应的化学方程式是____________。

考点:设计实验方案及探究实验单质钠
题型:实验题
Once I went shopping on my first visit to Macao. Coming from cold and cloudy England, I enjoyed the sun and dressed in a T-shirt and a        skirt. Not having much        to enjoy the sun in England, my legs were very white. In England this is not a fashionable look at all . Most women spend every sunny day out trying to get darker skin. The darker the skin, the better the look. I have tried to get darker but         works for me!
As I        one shop, the two shop assistants kept looking at my legs the whole time , talking quietly to each other in Chinese. I began to feel uncomfortable and asked my friend     we could leave. After we left the shop, she asked me what was wrong. I complained about the shop assistants being very impolite . They     be talking about my white skin. My friend laughed. “They weren’t laughing at you. They were saying how nice your legs are. Many Chinese women want to have white skin like yours.       , there are many beauty products in the shops to make skin whiter and a lot of money is spent on them.”
It just shows that we are never happy with what we have. The grass is       greener on the other side. If the women of the West and East        the same way, Western women wouldn’t spend so much money on cream that makes skin darker and women from the        wouldn’t need to use cream that makes skin whiter.
小题1:
A.longB.shortC.beautifulD.expensive
小题2:
A.moneyB.exerciseC.spaceD.chance
小题3:
A.anythingB.everythingC.nothingD.something
小题4:
A.broke intoB.ran pastC.got out ofD.walked around
小题5:
A.thoughB.andC.butD.if
小题6:
A.mustB.mustn’tC.canD.needn’t
小题7:
A.In a wordB.In the endC.InfactD.In order
小题8:
A.neverB.alwaysC.everD.seldom
小题9:
A.thoughtB.sawC.workedD.decided
小题10:
A.EastB.WestC.SouthD.North
题型:实验题

下列各句中,加粗的词语运用正确的一句是 [ ]

A、同学们问我的学习方法是什么?依我的门户之见,上课一定要专心听讲,遇到问题及时请教别人。

B、直到锒铛入狱,这个贪污犯才痛定思痛地说了一句心里话:“我落到今天这样的下场,全是自找的。”

C、地质勘探队员生活十分艰苦,但他们对此却不以为然,他们一心扑在工作上,要为国家找出丰富的矿藏。

D、这次试验眼看就要成功了,大家一定要坚持下去,千万不要懈怠。如果功亏一篑,实在可惜。

题型:实验题

女,24岁,足月妊娠临产10小时,宫口扩张2cm,自觉下腹部持续疼痛,孕妇烦躁不安,疼痛喊叫,宫缩频率高,子宫下段收缩最强。

此时应首选的措施是()。

A.静滴缩宫素

B.行剖宫产

C.肌注哌替啶

D.人工破膜

E.无需任何处理

题型:实验题

某班同学在编写“诸子百家论治国”的历史短剧时,为扮演孟子的同学所设计的台词应是(  )

A.“兼爱非攻,互助互爱”

B.“民贵君轻,社稷次之”

C.“敬鬼神而远之”

D.“以法治国,中央集权”

题型:实验题

桐城派是清代影响最大的散文流派。

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