问题 选择题

某种橡胶分解产物为碳氢化合物,对这种碳氢化合物作如下实验:①若取一定量完全燃烧,使燃烧后的气体通过盛有氯化钙的干燥管,干燥管增重0.72g,再通过石灰水,石灰水增重2.2g。②经测定,该碳氢化合物(气体)的密度是相同条件下氢气密度的34倍。③该碳氢化合物0.1mol能和32g溴起加成反应.④经分析,在③的生成物中,溴原子分布在不同的碳原子上,且溴代物中有一个碳原子在支链上。下列说法正确的是

A.该碳氢化合物为2-甲基-1,3-戊二烯

B.该碳氢化合物与溴单质1:1加成时可以生成3种不同的产物

C.该碳氢化合物与溴单质1:1加成时可以生成2种不同的产物

D.该碳氢化合物与足量氢气加成时可以生成正戊烷

答案

答案:B

题目分析:盛有氯化钙的干燥管增重0.72g,说明生成水0.72g(0.04mol),通过石灰水,石灰水增重2.2g,说明生成CO22.2g(0.05mol),由此可知该化合物中C、H个数比为5:8,根据该碳氢化合物(气体)的密度是相同条件下氢气密度的34倍,可知其相对分子质量为68,故分子式为C5H8;根据0.1mol能和32g(0.2mol)溴起加成反应,说明分子中含有2个碳碳双键或1个碳碳三键,再根据加成产物中溴原子分布在不同的碳原子上,且溴代物中有一个碳原子在支链上,可知该有机物含2个碳碳双键,且含有一个支链,故该化合物为2-甲基-1,3-丁二烯,与溴1:1加成时可生成3种产物(1,2-加成或1,4-加成),答案为B。

阅读理解

第二节:下面是今年部分旅游线路介绍及想出游人的兴趣特点介绍,请阅读相关信息并按要求匹配信息。请将答案的字母编号写在答题卷标号为66-70的括号上。共5小题,10分)

首先,请阅读旅游线路介绍:

Here is a selection of the tours organized for the coming year:

★-------8 days mountaineering trip--climb Yunnan's third highest peak, the Haba snow mountain. This is ideal for the truly adventurous. You need to be fit and healthy.

★------ 8 days cycling tour from Qiaotou Town--visit the spectacular Tiger Leaping Gorge. It is a leisurely tour suitable for anyone who is reasonably fit and healthy. No previous cycling experience is necessary and all our routes are on flat land!

★----- 8 days river rafting--white water adventure on the Yangtze from the old town of Lijiang. This adults-only tour is exclusively for good swimmers and physically fit.

★----- 10 days rainforest trek(乘牛车旅行)--spend 5 days in the forest and meet the local people. This is a walking tour and no previous experience is needed, just a curious mind and an interest in traditional cultures.

★------10 days horse trekking tour--visit authentic Tibetan villages of Shangri-la. The ultimate horse-riding experience in a spectacular mountain environment. This trip is for confirmed riders only. Don't expect three-star hotels on this trip.

请阅读以下有出游意向的人的要求,然后匹配旅游线路所适合的出游者。

A. An 18-year-old student who is interested in traditional lifestyles but only has a week to spare.

B. A family of four, including parents, a sixteen-year-old son and a thirteen-year-old daughter, who are looking for a fun holiday. All four are good riders and strong swimmers.

C A retired couple who are reasonably fit and who want to find out more about ethnic minorities'(少数民族) cultures.

D A group of four young adults who are into all extreme sports and are looking for something with plenty of excitement. They are more interested in the scenery than in the life of the locals.

E A family of five including a ten-year-old girl. They have many different interests and they are looking for a relaxing holiday.

F. A honeymoon couple who want the holiday of a lifetime. They are both sporty types and love water sports.

旅游线路                              出游者

66. 8 days mountaineering trip                 A. An 18-year-old student

67. 8 days cycling tour                      B. A family of four

68. 8 days river rafting                       C. A retired couple

69. 10 days rainforest trek                    D. A group of four young adults

70. 10 days horse trekking tour                E. A family of five

F. A honeymoon couple

单项选择题