问题 问答题

根据下列装置图,回答有关问题

(1)写出图中标号仪器的名称:a______,b______.

(2)实验室用高锰酸钾制取氧气,反应的化学方程式为______.

(3)通过查阅资料得知:①氨气是一种密度比空气小且极易溶于水的气体;②氨气在加热条件下能与氧化铜反应生成铜、水和空气中含量最多的气体.小芳同学加热氯化铵和氢氧化钙的固体混合物制取氨气,应选择的发生装置是______,收集装置是______.(填字母)

(4)小芳将收集满氨气的集气瓶倒扣在滴有无色酚酞的水中,观察到得现象是______.

(5)写出氨气和氧化铜反应的化学方程式:______.

答案

(1)a、b属于常用的实验仪器分液漏斗和试管

(2)实验室用KMnO4制取氧气适于固体加热的装置,应选A装置;

(3)通过阅读氨气密度比空气小且极易溶于水的气体,所以只能选取E进行收集;制取氨气的反应物氯化铵和氢氧化钙需加热的固体混合物,所以只选择B;

(4)由于氨气是一种碱性气体,所以氨水遇到无色酚酞试液便红色.

(5)化学方程式的书写关键是决定另一生成物是N2,配平即可.

故答案为:

(1)分液漏斗 试管

(2)2KMnO4

 加热 
.
 
K2MnO4+MnO2+O2

(3)B、E

(4)集气瓶中充满液体无色酚酞试液变红色

(5)2NH3+3CuO

 加热 
.
 
3Cu+3H2O+N2

完形填空

 
“Low *carbon” becomes the most popular words these days because more and more people pay attention to our environment. Not only China but all other    1   concentrate on the topic of “low carbon”. Low carbon life    2    a kind of lifestyle in which people do their best to use less energy. The purpose of the lifestyle is to push us to    3    the environment.
Because of the fast increase of population and human *desire, the human living environment, health and safety are    4    worse and worse. So we can say, the lifestyle is becoming the killer of the earth and human beings. Therefore, low carbon life is needed by man’s own health. So we should develop good    5    in our daily life. For example, when we go shopping, we’d better use    6    plastic bags. We should eat more    7    and less meat. As for clothing, we’d better buy the necessary clothes and not buy clothes with animal *leather. As for housing, when building a    8   , we must use green material; buy the lights that need less energy and remember to    9    the lights when not needed; put rubbish into different kinds and recycle the useful things, like bottles and paper. As for transportation, we can    10    if you go to the places near your house. For short trips, we can ride a bike instead of driving a car. Try to use public transportations. As for working, companies should    11    clerks to use e-mail, MSN and other ways instead of using paper. We use paper only when necessary. For using    12    : If you don’t use computer in a short time, you can change the computer into its “sleep”.
Besides, we should try    13    best to tell the people around us the importance of the low carbon lifestyle. And we can also ask them to    14    us to take the low carbon life, in this way, not only can we make our city better,    15    also it’s good for ourselves.
In all, it weighs greatly for all of us to put the low carbon lifestyle into practice.
小题1:
A.countriesB.citiesC.townsD.villages
小题2:
A.helpsB.meansC.livesD.thinks
小题3:
A.keepB.polluteC.protectD.make
小题4:
A.doingB.tryingC.discoveringD.becoming
小题5:
A.listsB.shopsC.decisionsD.habits
小题6:
A.moreB.lessC.fewerD.many
小题7:
A.teaB.vegetablesC.meat D.food
小题8:
A.houseB.bridgeC.storeD.market
小题9:
A.turn offB.turn onC.put offD.put on
小题10:
A.walkB.rushC.runD.drive
小题11:
A.makeB.letC.seeD.encourage
小题12:
A.machineB.lightC.bedD.computer
小题13:
A.oursB.weC.ourD.us
小题14:
A.stopB.tell C.joinD.hear
小题15:
A.soB.butC.andD.though
多项选择题