问题 填空题

硅在地壳中的含量较高,硅及其化合物的开发由来已久,在现代生活中有广泛应用。回答下列问题:

(1)陶瓷、水泥和玻璃是常用的传统的无机非金属材料,其中生产普通玻璃的主要原料有                     

(2)高纯硅是现代信息、半导体和光伏发电等产业都需要的基础材料。工业上提纯硅有多种路线,其中一种工艺流程示意图及主要反应如下:

①工业上用石英砂和焦炭在电弧炉中高温加热到1600℃-1800℃除生成粗硅外,也可以生产碳化硅,则在电弧炉内可能发生的反应的化学方程式为                       

②在流化床反应的产物中,SiHCl3大约占85%,还有SiCl4、SiH2Cl2、SiH3Cl等,粗硅生成SiHCl3的化学反应方程式                              

(3)有关物质的沸点数据如下表,提纯SiHCl3的主要工艺操作依次是沉降、冷凝和       ;SiHCl3极易水解,其完全水解的产物为       

物质SiSiCl4SiHCl3SiH2Cl2SiH3ClHClSiH4
沸点/℃235557.631.88.2-30.4-84.9-111.9
 

(4)还原炉中发生的化学反应为:                                

(5)氯碱工业可为上述工艺生产提供部分原料,这些原料是       

答案

(1)石英砂、纯碱和石灰石(2分)

(2)①SiO2 + 2CSi + 2CO↑(2分)、SiO2 + 3CSiC + 2CO↑(2分)

②Si + 3HClSiHCl3 + H2(2分)

(3)蒸馏(1分)   H4SiO4(或H2SiO3)、H2、HCl(2分,答不全,少一种扣一分,但有错不给分)

(4)SiHCl3 + H2 Si + 3HCl (2分)

(5)H2、HCl(2分)

题目分析:(1)生产普通玻璃的主要原料有石英砂、纯碱和石灰石

(2)①石英砂的主要成分是SiO2,与C可能的反应有:SiO2 + 2CSi + 2CO↑、SiO2 + 3CSiC + 2CO↑

②粗硅生成SiHCl3的化学反应方程式为Si + 3HClSiHCl3 + H2

(3)硅的氯化物的熔点相差较大且互溶,所以采用蒸馏的方法可提纯SiHCl3,从元素的种类上分析SiHCl3完全水解的产物有H4SiO4(或H2SiO3)、H2、HCl

(4)还原炉中发生的反应是氢气还原SiHCl3,化学方程式为SiHCl3 + H2 Si + 3HCl

(5)氯碱工业的产品有H2、Cl2、NaOH,所以为上述工艺生产提供部分原料是H2、HCl

阅读理解

Speakers of different languages not only describe the world differently but think about it differently too, according to a new study.

Researchers used a cartoon cat Sylvester to study how language was reflected (反映) in the gestures people made. Dr. Sotaro Kita of the University of Bristol’s Department of Experimental Psychology (心理学), showed the cartoon to a group of native English, Japanese and Turkish speakers and then watched their gestures as they described the actions they had seen. He found speakers of the three different languages used different gestures to describe the same event, which appeared to reflect the way the structure of their languages expressed that event. For example, when describing a scene where the cat swings on a rope, the English speakers used gestures showing an arc trajectory (弧形轨迹)  and the Japanese and Turkish speakers tended to use straight gestures showing the motion but not the arc.

Dr. Kita suggests this is because Japanese and Turkish have no proper verb to express the English meaning “to swing”. While English speakers use the arc gesture as their language can readily express the change of location and the arc-shaped trajectory, Japanese and Turkish speakers cannot as easily express the idea of movement with an arc trajectory so they use the straight gesture.

Dr. Kita said, “My research suggests that speakers of different languages cause different spatial (空间的) images of the same event in a way that matches the expressive possibilities of their own languages. In other words, language influences (影响) spatial thinking at the moment of speaking.”

68. 小题1:Researchers watched the gestures the people made because they wanted to know _____.

A.how language was reflected

B.whether they could express the same idea

C.whether they could describe what they had seen

D.how the structure of language changed69. 小题2:After watching the gestures of speakers of the three different languages, Dr. Kita concluded that _____.

A.Japanese and Turkish people couldn’t express the meaning of “swing”

B.English was obviously better than Japanese and Turkish

C.no word in Japanese and Turkish could express some ideas of English

D.every language had its own special way to describe things70.小题3:What is mainly discussed in the text?

A.Differences between languages.

B.Differences between gestures.

C.How people use different gestures to express the same event.

D.That language influences the way people think.

选择题