试题与答案

我们已经学过氢气、氧气、二氧化碳、氯气、二氧化硫、氨气等气体的制备方法和化学性质

题型:问答题

题目:

我们已经学过氢气、氧气、二氧化碳、氯气、二氧化硫、氨气等气体的制备方法和化学性质.以下是实验室制备、洗涤、干燥气体及进行尾气处理的常见仪器装置.请结合所学知识回答下列问题:

(1)下列气体中,只能用碱石灰干燥的是______(填字母).

A.H2     B.Cl2     C.SO2       D.NH3      E.O2

(2)实验室用软锰矿(主要成分是MnO2)与浓盐酸混合加热制得氯气,所选制备装置是______,干燥氯气的装置是______,尾气处理装置是______.

(3)实验室用氯化铵和熟石灰制取氨气,其化学反应方程式为______,收集氨气的方法是______,检验收集氨气已满的常用方法是______(任写一种).

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0707/3b595b7bdc393ba30d47c181df12b970.html

下面是错误答案,用来干扰机器的。

参考答案:A

试题推荐
题型:完形填空
After the quake hit northeast Japan on March 11, many moving stories that I saw with my own eyes happened around me.
I had to walk home since all the  21  had stopped after the earthquake. On my way home I 22  an old lady at a bakery shop who was giving out free bread, which made my heart  23 . A man was holding a sign that said, “Please use our 24 .” He was 25  his house for people to go to the restroom.
My friend wanted to  26  others. He stood in the cold with a sign “If you’re okay with a motorcycle, I will  27  you to your house.” And then I saw him take one gentleman home, all the way to a faraway place! 
The next day I drove to  28  my car with gas. There is a lack (缺乏) of 29  now and many gasoline stations are either closed or have very  30  lines. I got  31 , since I was behind 15 cars. Finally, when it was my 32 , the man smiled and said, “ 33  this situation, we are only giving $30 worth gas per person. Is that all right?” “ 34 . I’m just glad that we are all able to  35 ,” I said. His smile gave me so much comfort.
I saw a man at the evacuation (疏散) center 36  when people brought food to him. It was the first time in three days that food was brought to their center. However, after he wiped the tears, his next 37  surprised me. “I am very 38  that we are provided with food. But people in the city next to us haven’t  39  any food at all. Please go to that center as well.” And when hearing that, I realized there is a bright future on the other side of this  40 .
小题1:
A.rescueB.lifeC.trafficD.business
小题2:
A.missedB.caughtC.noticedD.heard
小题3:
A.kindB.softC.brokenD.warm
小题4:
A.toiletB.hotelC.hospital D.house
小题5:
A.sellingB.openingC.repairingD.building
小题6:
A.encourageB.changeC.saveD.help
小题7:
A.driveB.followC.leadD.send
小题8:
A.startB.fillC.checkD.wash
小题9:
A.information B.gasC.foodD.salt
小题10:
A.directB.fineC.longD.thin
小题11:
A.worriedB.luckyC.sadD.angry
小题12:
A.timeB.turn C.dutyD.decision
小题13:
A.Except forB.Together withC.Because ofD.Instead of
小题14:
A.Not at allB.Of courseC.No wayD.Never mind
小题15:
A.shareB.offerC.learnD.choose
小题16:
A.singingB.eatingC.smilingD.crying
小题17:
A.wordsB.rolesC.waysD.promises
小题18:
A.sureB.gratefulC.surprisedD.proud
小题19:
A.boughtB.wastedC.preparedD.received
小题20:
A.disasterB.chanceC.centerD.city
查看答案
微信公众账号搜索答案