【題目】為了驗(yàn)證木炭可被濃H2SO4氧化成CO2，選用如圖所示儀器(內(nèi)含物質(zhì))組裝成實(shí)驗(yàn)裝置：

(1)如按氣流由左向右流向，連接上述裝置的正確順序是(填各接口字母)：________接________，________接________，________接________。

(2)儀器乙、丙應(yīng)有怎樣的實(shí)驗(yàn)現(xiàn)象才表明已檢驗(yàn)出CO2?

乙中________________________，丙中________________________。

(3)丁中酸性KMnO4溶液的作用是__________________________________________。

(4)寫(xiě)出甲中反應(yīng)的化學(xué)方程式____________________________________________。

【答案】(1)A F E C D B

(2)澄清石灰水變渾濁 品紅溶液未褪色

(3)吸收SO2

(4)C+2H2SO4(濃)CO2↑+2SO2↑+2H2O

【解析】木炭與濃硫酸加熱反應(yīng)生成CO2、SO2和H2O。其中CO2、SO2在化學(xué)性質(zhì)上的相同點(diǎn)都是酸性氧化物，都跟澄清石灰水中的Ca(OH)2反應(yīng)，使澄清石灰水變渾濁，這會(huì)干擾CO2的鑒別。SO2和CO2在化學(xué)性質(zhì)上的明顯不同點(diǎn)是SO2有漂白性和強(qiáng)的還原性，而CO2都沒(méi)有。所以，在鑒別CO2時(shí)，首先用酸性KMnO4溶液將SO2氧化除去，再用品紅溶液檢驗(yàn)是否被完全除去，最后用澄清石灰水檢驗(yàn)CO2的存在，是一種確認(rèn)CO2存在的好方案。

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中地理 來(lái)源： 題型：

【題目】小王在年初用50萬(wàn)元購(gòu)買(mǎi)一輛大貨車(chē)，第一年因繳納各種費(fèi)用支出6萬(wàn)元，從第二年起，每年都比上一年增加支出2萬(wàn)元，假定該車(chē)每年的運(yùn)輸收入均為25萬(wàn)元.小王在該車(chē)運(yùn)輸累計(jì)收入超過(guò)總支出后，考慮大貨車(chē)作為二手車(chē)出售，若該車(chē)在第年年底出售，其銷(xiāo)售價(jià)格為25-萬(wàn)元（國(guó)家規(guī)定大貨車(chē)的報(bào)廢年限為10年）.

（1）大貨車(chē)運(yùn)輸?shù)降趲啄昴甑�，該�?chē)運(yùn)輸累計(jì)收入超過(guò)總支出？

（2）在第幾年年底將大貨車(chē)出售，能使小王獲得的年平均利潤(rùn)最大（利潤(rùn)=累計(jì)收入+銷(xiāo)售收入-總支出）？

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】閱讀理解。

閱讀下列短文，從每題所給的四個(gè)選項(xiàng) （A 、B 、C 和 D ）中，選出最佳選項(xiàng)。

Summer Science Class registration begins on March 8! If you are interested in science，the environment，or conservation and you are in grades 7－12，sign up soon for Black Rock Forest Consortium's Summer Science Class program. You can download the Summer Science Classes 2013 brochure here. It is easy to register；just call 8455344517 or click here.

Twelve weeklong courses in the natural sciences and the arts are offered at Black Rock Forest in Cornwall from July 15 through August 9.Two more classes are offered with site partners，including “The Art of Scientific Observation，” hosted jointly by Black Rock Forest Consortium and Storm King Art Center，one of the world's leading sculpture parks，and “A Nautical Expedition” hosted jointly by the Consortium and the Constitution Marsh Audubon Center.

We are delighted to announce two special “away” classes that are part of the Summer Science Class program this year: an “Adirondack EcoAdventure” beginning August 11，and “Conservation Biology in Florida，” beginning June 23 and featuring field work on the Gulf Coast in cooperation with the University of Florida's Seahorse Key Marine Biological Laboratory. For more information on the Summer Science Class program，please read our press release.

Black Rock Forest Consortium is a nonprofit organization founded in 1989 to advance scientific understanding of the natural world through research，education and conservation programs.

【1】If you want to be a member of Summer Science Class，you should ________．

A．visit Black Rock Forest first

B．download their brochure

C．cal a phone 8455344517

D．register before March 8

【2】Summer Science Class's courses are________．

A．only about science subjects

B．cooperated by several organizations

C．from July 15 through August 9

D．hosted by the world's leading professors

【3】Where can you find the article?

A．From a web site.

B．From a traveling brochure.

C．From a novel book.

D．From one famous magazine.

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】閱讀理解。

閱讀短文，從每題所給的四個(gè)選項(xiàng)(A、B、C和D)中，選出最佳選項(xiàng)。

“BEST PRODUCT WE’VE EVER SEEN”－THIS REALLY WORKS－ON SALE NOW

Need to lower your cholesterol（膽固醉）？We strongly recommend CholestrolblockTM. This really works, and now is the best time to buy，because of a special offer for the first 250 customers only for a limited time.

* Takes cholesterol out of food，no matter what you eat.

* Clinically demonstrated effective in university and hospital testing．

* Lowers cholesterol absorption up to 42% or more．

* “NO SIDE EFFECTS unlike Liptor, Zocor，Crests＆other commonly prescribed（處方的） medications－safe and effective.

* “Outsells all other brands on Internet every month.

LIMITED TIME ONLY一Try Cholesterol Watchers free with purchase.

【1】If you happen to be the 200th customer to buy Cholesterolblock, you will .

A. be able to buy it at a low price

B. be the luckiest one online

C. try it free of charge

D. change your diet

【2】Liptor，Zocor，Crestor are ．

A. diseases B. side effects

C. medicines D. cholesterol

【3】Where can you most probably read this passage?

A. In a travel guide book．

B. On a university bulletin board（布告牌）．

C. In a health magazine.

D. In a doctor’s prescription.

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】短文改錯(cuò)

假定英語(yǔ)課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處加一個(gè)漏詞符號(hào)(/\)，并在其下面寫(xiě)出該加的詞。

刪除：把多余的詞用斜線(xiàn)(\)劃掉。

修改：在錯(cuò)的詞下畫(huà)一橫線(xiàn)，并在該詞下面寫(xiě)出修改后的詞。

注意：1. 每處錯(cuò)誤及修改均僅限一詞；

2. 只允許修改10處，多者(從第11處起)不計(jì)分。

What is the most valuable thing in the world? Although the answer many vary from person to person, but as for me, reading books is most valuable than anything else. As old saying goes, “To open a book is always helpful. ”

First, books are our teachers. They introduce different kind of knowledge to us, include science and literature. Books are our friends either. With the valuable experience in them, books often helps us out when we meet difficulties. By increasing our knowledge and enlarge our experience, books lead us down the road to succeed. Therefore, to read more books is the best policy for we young students.

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】 短文改錯(cuò)（共10小題；每小題l分，滿(mǎn)分10分）

假定英語(yǔ)課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處加一個(gè)漏字符號(hào)（∧），并在其下面寫(xiě)出該加的詞。

刪除：把多余的詞用斜線(xiàn)（＼）劃掉。

修改：在錯(cuò)的詞下劃一橫線(xiàn)，并在該詞下面寫(xiě)出修改后的詞。

注意：

1. 每處錯(cuò)誤及其修改均僅限一詞；

2. 只允許修改10處，多者（從第11處起）不計(jì)分。

Dear high school freshmen,

You were off to high school. You are now an official teenager get ready to become a young adult. Most of you will be excited in the first day. But some of you may feel concerned about which lies ahead. Surviving high school is total possible. You should join in at the least one activity before school starts. Besides, neither limit you to just the friends you already have nor afraid to ask for help. As a graduation, I’ll tell you the next three years of your life will fly by. It’s what you do during this period that count the most.

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】 短文改錯(cuò)（共10小題；每小題l分，滿(mǎn)分10分）

假定英語(yǔ)課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處加一個(gè)漏字符號(hào)（∧），并在其下面寫(xiě)出該加的詞。

刪除：把多余的詞用斜線(xiàn)（＼）劃掉。

修改：在錯(cuò)的詞下劃一橫線(xiàn)，并在該詞下面寫(xiě)出修改后的詞。

注意：

1. 每處錯(cuò)誤及其修改均僅限一詞；

2. 只允許修改10處，多者（從第11處起）不計(jì)分。

Today I visited the Smiths — my first visit to a American family. They live in a small quietly town. It was very kind for them to meet me at the railway station and drove me to their home. The Smiths did their best to make me feel at home. They offered myself coffee and other drinks. We have a good time talking or laughing together. They happy to know everything about China and asked me lots of question. In fact, they are planning to visit China in next year.

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】 短文改錯(cuò)（共10小題；每小題l分，滿(mǎn)分10分）

假定英語(yǔ)課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫(xiě)的以下作文。文中共有10處語(yǔ)言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處加一個(gè)漏字符號(hào)（∧），并在其下面寫(xiě)出該加的詞。

刪除：把多余的詞用斜線(xiàn)（＼）劃掉。

修改：在錯(cuò)的詞下劃一橫線(xiàn)，并在該詞下面寫(xiě)出修改后的詞。

注意：

1. 每處錯(cuò)誤及其修改均僅限一詞；

2. 只允許修改10處，多者（從第11處起）不計(jì)分。

This term our school has offer more than ten optional courses with which students can choose. The courses are given from 4:00 to 5:30 every Thursday afternoon. Students show interest in optional courses. Their favorite are computers, speaking English, art and so on. They say they have learned a lot about that is not taught in textbooks and they have got a great deal of practice. Therefore, students are not quite satisfied. They hope that more optional courses will be offered or the homework will be less. They suggest more trips and visits to be organized so that they can learn more about what’s going on inside school.

查看答案和解析>>

科目：高中地理 來(lái)源： 題型：

【題目】如果小朋友誤吞了金屬類(lèi)物品于腹腔內(nèi)，如何把它取出來(lái)呢？某同學(xué)在學(xué)習(xí)了磁場(chǎng)之后，設(shè)計(jì)出了這樣一個(gè)儀器，如圖所示．當(dāng)儀器頂部接觸金屬物品時(shí)，將手控環(huán)內(nèi)推，再拉出整條塑料管。

（1）你能說(shuō)出這種儀器的原理嗎？

（2）如果小朋友不慎吞下的是易拉罐拉環(huán)或一個(gè)回形針，哪種物體可以用這種儀器取出來(lái)？

（3）如果把活動(dòng)永磁鐵換成電磁鐵，你認(rèn)為是不是更實(shí)用呢？

查看答案和解析>>

同步練習(xí)冊(cè)答案