问题 填空题

下列实验操作或叙述正确的是        (填序号,多选倒扣分,扣完为止。)

A.乙醇中含有少量水可加入金属钠再蒸馏制得无水乙醇

B.将无水乙醇和浓硫酸按体积比3:1混合,加热至140°C制取乙烯

C.蔗糖水解用稀硫酸作催化剂,加热一段时间,然后加入银氨溶液检验是否发生了水解

D.在鸡蛋白溶液中加入浓HNO3,微热后会生成黄色物质E.油脂在皂化反应后,反应混合物中加入食盐可将肥皂分离出来

F.植物油和裂化汽油可用溴水鉴别

答案

DE

题目分析:A不正确,应该用生石灰;B不正确,应该是170℃;C不正确,加入银氨溶液之前,首先要加入氢氧化钠溶液中和硫酸;D是蛋白质的显色反应,正确;E是盐析过程,正确;植物油和裂化汽油均可使溴水褪色,不能鉴别,F不正确,答案选DE。

点评:该题是基础性试题的考查,试题难易适中,侧重对学生实验能力的培养和训练。该类试题需要注意的是化学实验常用仪器的使用方法和化学实验基本操作是进行化学实验的基础,对化学实验的考查离不开化学实验的基本操作,主要是实验基本操作为中心,通过是什么、为什么和怎样做重点考查实验基本操作的规范性和准确性及灵活运用知识解决实际问题的能力。

综合题
阅读理解

In July 2008, Zheng Jie mad her own bit of sporting history for China. At the Wimbledon Tennis Championships in London, Zheng beat Ana Ivanovic, who was then the world number one, on the way to a place in the semifinals. It was the first time that a Chinese player had reached a Grand Slam tournament semifinal(大满贯半决赛).

“After my performance at Wimbledon when I returned to China, I was welcomed by a huge crowd at the airport. I was excited that I could turn so many people’s attention to the tennis,” said Zheng.

Zheng was born in Chengdu, Sichuan in July, 1983 and donated her winning from Wimbeldon to the Sichuan earthquake relief-fund.(救济金)

She followed up her Winbledon performance with a bronze medal at the Beijing Olympic Game.

“To me the Olympic is a wonderful memory of my career path. When I watched the five-starflag rising up in my own country,it’s hard to describe or expressthe feelings of pride with words,” she said. Zheng’s singles displays in 2008 represented new progress in her career and reminded the world of the potential of Chinese tnnis.

Zheng’s parents didn’t play tennis themselves but encouraged her to take up the sport just to stay fit, but Zheng became lost in the game.

In fact, Zheng was often overlooked by her coaches. She said,”Acutally I played really well, but just because I want taller or stronger than others,the coaches didn’t think I was fit for tennis. But I really like playing tennis. If you say I can’t make it ,I’ll prove it to you that I can.”

Now Zheng Jie has become the top fof Asian tennis. She may prove to be the first of many Chinese players to make a great impact in the tennis world in the years to come.

63.According to the first two paragraphs, Zheng Jie____________

A. is the first Chinese player to join in an international tennis competition.

B.got a bronze prize at the Wimbledon Tennis Championships in July 2008

C.is the first Chinese tennis player to reach a Grand Slam tournament semifinal

D. makes more and more Chinese people interested in playing volleyball

64.Zheng Jie’s original purpose of playing tennis was to__________.

A. realize her parents’ dreams

B.win prizes in future cpmpetitions

C. become simmer and more beautiful

D. keep in good health

65.What can we know from the passage?

A. Zheng Jie won her coaches’ attention at the very beginning

B. Zheng Jie’s height affected her performance in the training

C. Zheng Jie didn’t like playingtennis much at the beginning

D. Zheng Jie’s success proved the potential of Chinese tennis

66.The following word can all be used to discribe Zheng Jie EXCEPT________.

A. warm-hearted    B. careless    C. determined  D. self-confident