问题 问答题

根据下列实验装置图1,问答问题:

(1)写出标有序号的仪器名称:①______,②______.

(2)在实验室中用过氧化氢溶液和二氧化锰混合制取氧气时,发生反应的化学方程式为______,应选择的发生装置为______(填写装置的字母代号,下同).要收集一瓶较纯净的氧气应选择的收集装置为______.

(3)如果用如图2装置收集氧气,则气体从______端进入(填c或d).

(4)实验室常用锌粒与硫酸溶液在常温下反应制取氢气,你认为应选择的发生装置为______.

答案

(1))①试管;②酒精灯

(2)双氧水是液体,二氧化锰是固体,反应条件是常温,故发生装置选B;排水法比排空气法收集的更纯净一些,故选D

(3)用多功能装置收集气体,用排空气法收集,密度比空气大的气体从长管进,空气从短管出.氧气密度比空气大,故选从c端进入;

(4)锌粒是固体,稀硫酸是液体,反应条件是常温,故发生装置应选择B

故答案为:

(1)①试管;②酒精灯

(2)2H2O2

 MnO2 
.
 
2H2O+O2↑;B;D

(3)C;

(4)B.

单项选择题
写作题

写作.

     As Guangzhou is gearing up for the 2010 Asian Games,Guangzhou citizens in every field

are making an endeavor to help the host city take on a new look. On the 5th of January,

Mayor Zhang Guangning announced that the government is considering to give its people a

big Asian Games present as a reward for their cooperation and devotion to the Games. As

to what present would be,relevant departments would collect ideas from the citizens.

     This good news has brought about great guesses among Guangzhou people. Thus various

opinions have emerged. Some prefer to have several days' holiday as a reward,while others

hope to receive the tickets to the events in the Asian Games. Sports lovers are eager to have

free access to city stadiums. Some opportunists suggest the government hand out lottery

tickets,in which case they may have the chance to win a big fortune. In contrast,those who

hold a downtoearth attitude are looking forward to some new year lucky money or to have

more discounts when taking buses or the subway. For apartment hunters in their 20s or 30s,

nothing can be more comforting than the thought of being able to buy an Asian Games Village

apartment at a reasonable and acceptable price.

【写作内容】

1.约30个词概括短文的要点;

2.然后以约120个词写一篇文章,并包括以下要点:

(1)你对政府给市民发送亚运大礼包的看法.

(2)你想要政府送什么样的亚运大礼?为什么?

【写作要求】

1.可以参照阅读材料,但不得直接引用原文中的句子;

2.不得出现真实姓名和学校名称.

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