问题 填空题

(4分)

通过一年的化学学习,同学们对身边的常见物质有所认识,并能用所学的知识解释一些问题。请按要求回答下列问题:

(1)服用含Al(OH)3的药物来治疗胃酸过多,其反应方程式为         

(2)鉴别常用铵态氮肥、磷肥、钾肥三种化肥,首先看外观,        的是磷肥,然后将另两种化肥各取少许,分别和少量的熟石灰粉末混合、研磨,能嗅到气味的是       

(3)碳单质包括金刚石、石墨和C60等,它们的化学性质相似,如它们都有可燃性,试写出C60在空气中完全燃烧的化学方程式            

答案

(1)Al(OH)3 + 3HCl     AlCl3 + 3H2

(2) 灰白色粉末状、铵态氮肥

(3)C60 + 60O2 60CO

:(1)胃酸即盐酸能与氢氧化铝发生中和反应,生成氯化铝和水;

故选Al(OH)3+3HCl=AlCl3+3H2O;

(2)磷肥通常为灰白色,不同于氮肥、钾肥,可观察颜色鉴别出磷肥;而铵态氮肥中含有铵根,遇碱释放出能使红色石蕊试纸变蓝的具有氨臭味的氨气;

故答案为:灰白色粉末状;铵态氮肥;

(3)可燃物中的碳完全燃烧生成二氧化碳,因此C60完全燃烧生成二氧化碳;

故选C60 + 60O2 60CO2

阅读理解

阅读理解。

        This story is about a beautiful, expensively dressed lady who complained to her psychiatrist (精神科医生) that she felt her whole life was empty; it had no meaning. So the psychiatrist called an old lady who cleaned the office

floors, and then said to the rich lady, "I'm going to ask Mary here to tell you

how she found happiness. All I want you to do is listening."

        So the old lady put down her broom and sat on a chair and told her story, "Well, my husband died of malaria (疟疾) and three months later my only son was killed by a car. I had nobody. I had nothing left. I couldn't sleep; I couldn't eat; I never smiled at anyone. I even thought of taking my own life. Then

one evening a little kitten followed me home from work. Somehow I felt

sorry for that kitten. It was cold outside, so I decided to let the kitten in. I got it some milk, and it licked (舔) the plate clean. Then it purred (发出呼噜声) and rubbed against my leg, and for the first time in months, I smiled. Then I

stopped to think: if helping a little kitten could make me smile, maybe doing

something for people could make me happy. So the next day I baked some

biscuits and took them to a neighbor who was sick in bed. Every day I tried to do something nice for someone. It made me so happy to see them happy.

Today, I don't know of anybody who sleeps and eats better than I do. I've

found happiness by giving it to others."

        When she heard that, the rich lady cried. She had everything that money

could buy, but she had lost the things which money cannot buy.

1.Why did the expensively dressed lady came to her psychiatrist?

A.Because she was ill.                

B.Because she had nothing to eat.

C.Because she couldn't feel happy at all.  

D.Because she couldn't sleep well.

2.The psychiatrist called an old lady who cleaned the office floors to_____.

A.talk with the rich woman              

B.help the psychiatrist to clean his office

C.tell the rich woman how she found happiness

D.share the rich woman's sadness

3.The old woman lost her ______relatives(亲人) together.

A.only one    

B.two            

C.three          

D.none

4.It is ________ who helped the old woman to find happiness.

A.the psychiatrist  

B.the rich woman  

C.the little kitten.

D.her neighbor

5.From the passage we can know: happiness comes from __________

A.money        

B.the kitten

C.the psychiatrist  

D.giving

单项选择题