问题 实验题

(7分)实验室用加热固体氯化铵和氢氧化钙的混合物制取氨,反应的化学方程式为:                                                                。

所制得气体中常含有少量杂质气体,为了得到纯净的氨气并加以检验,请在下列装置或试剂中,根据要求作出适当选择,并将编号字母填入表中的空格处。

(1)装置:

(2)试剂: a.NaOH溶液   b.澄清石灰水   c.浓硫酸   d.饱和NaHCO3溶液

e.碱石灰       f.品红溶液     g.湿润的红色石蕊试纸  

制取气体杂质气体制取气体的发生装置除去杂质气体的净化装置收集装置净化装置内

所用试剂

检验制得气体所用试剂
NH3H2O(g)     

答案

Ca(OH)2 + 2NH4Cl CaCl2 + 2NH3↑+ 2H2O(2分) (以下各空1分)

NH3H2O(g)AGFeg

实验室制取氨气的方程式为Ca(OH)2 + 2NH4Cl CaCl2 + 2NH3↑+ 2H2O。

根据制取氨气的原理可知,发生装置属于固体和固体之间加热制取气体的,所以选择A。氨气是碱性气体,干燥应该用碱石灰,碱石灰可以放在干燥管内,答案是G和e。氨气极易溶于水,不能用排水法收集。氨气的密度小于空气的,用向下排空气法收集。氨气是碱性气体,溶于水显碱性,可以用湿润的红色石蕊试纸检验。

完形填空
Everyone in the village knew who Ugly was. Ugly was a_1_with many     injuries. His left foot appeared to have been badly broken .Ugly only loved two things in this world: eating garbage and ,shall we say ,__2 __.However, every  time someone saw Ugly there was the__3__reaction. All the children were warned not to___4_him, and the adult threw rocks at him when he tried to follow them. Whenever he found children, he would come running and putting his head against their hands. If you ever _5___him up he would immediately begin suckling(允吸).on your shirt, fingers, whatever he could find . One day, Ugly shared his love with the neighbour’s___6_dog . They did not respond __7__,and Ugly was badly treated . Even from the end of the__8_I could hear his screams, and I tired to rush to his aid. By the time I got to where he was __9__,it was clear Ugly’s life was almost at an end. It must be_10__him terribly, I thought . Then I felt a familiar sucking feeling on my _11__. Ugly, in so much ___12_, was trying to suckle my ear. I pulled him closer to me , and he_13___suckled my fingers and watched me .Even in the greatest pain, that ugly cat was asking only for a little love ,perhaps some ___14_.At that moment I thought Ugly was the most 15____and loving creature I had ever seen .Never once did he bite me, or even try to get away from me. He just _16___me completely trusting in me to relieve his pain. Ugly died in my __17__before I could get inside. He taught me more about __18__than a thousand books, lectures, or talk show ever could . He had been __19__on the outside ,__20 I was on the inside .To give my pity and love to those I cared for.
小题1:
A.catB.dogC.childD.bird
小题2:
A.running B.foodC.loveD.playing
小题3:
A.interestingB.funnyC.immediateD.same
小题4:
A.touchB.ownC.buyD.feed
小题5:
A.warmedB.broughtC.pickedD.lifted
小题6:
A.lovelyB.fierceC.gentleD.big
小题7:
A.politelyB.foolishlyC.rudelyD.kindly
小题8:
A.villageB.houseC.streetD.woods
小题9:
A.lyingB.sleepingC.playingD.fighting
小题10:
A.handingB.hurtingC.treatingD.hitting
小题11:A face          B. hand        C.  ear       D. finger
小题12:A pain          B. excitement    C. happiness   D. worry
小题13:
A.weaklyB.softlyC.warmlyD.gladly
小题14:
A.careB.comfortC.garbageD.pity
小题15:
A.beautifulB.brave C.curiousD.miserable
小题16:
A.waited forB.tore forC.looked up atD.glanced at
小题17:
A.armsB.roomC.carD.mind
小题18:
A.lifeB.givingC.braveryD.struggle
小题19:
A.desertedB.injuredC.destroyedD.damaged
小题20:
A.andB.soC.butD.or
单项选择题