北京市海淀區(qū)高三年級(jí)第一學(xué)期期中練習(xí)

化 學(xué) 試 題

本試卷分為第Ⅰ卷（選擇題）和第Ⅱ卷（非選擇題）兩部分，共100分�？荚嚂r(shí)間120分鐘。答題時(shí)請(qǐng)將第Ⅰ卷每小題的正確答案選出后，填在第4頁(yè)答卷表格的相應(yīng)空格中，若僅答在第Ⅰ卷上則不給分。請(qǐng)將第Ⅱ卷各題的答案直接答在試卷的相應(yīng)位置上。

可能用到的相對(duì)原子質(zhì)量：

H 1   C 12   N 14   O 16   Na 23   S 32    Cl 35.5    Ca 40    Fe 56    Cu 64  

第Ⅰ卷（選擇題  共45分）

本卷共15道小題，每小題3分，共45分。每小題只有一個(gè)選項(xiàng)符合題意。

1．化學(xué)與生活、社會(huì)密切相關(guān)。下列說(shuō)法不正確的是                                            （    ）

A．我國(guó)規(guī)定商家不得無(wú)償提供塑料袋，目的是減少“白色污染”

B．乙醇是一種易燃燒污染小的可再生能源，但只能在實(shí)驗(yàn)室內(nèi)作燃料

C．化石燃料不可再生，使用太陽(yáng)能代替化石燃料，有利于節(jié)約資源、保護(hù)環(huán)境

D．積極開發(fā)廢電池的綜合利用技術(shù)，防止其中的重金屬鹽對(duì)土壤和水源造成污染

2．下列說(shuō)法正確的是                                                                                           （    ）

  A．電解質(zhì)溶液導(dǎo)電屬于物理變化 

  B．由一種元素組成的物質(zhì)一定是純凈物 

  C．金屬氧化物不一定是堿性氧化物 

  D．水的凈化、消毒都屬于氧化還原反應(yīng)

3．下列實(shí)驗(yàn)?zāi)苓_(dá)到預(yù)期目的的是                                                                           （    ）

  A．通過(guò)電泳實(shí)驗(yàn)證明膠體帶電

  B．通常利用丁達(dá)爾效應(yīng)區(qū)別溶液與膠體

  C．滲析實(shí)驗(yàn)說(shuō)明膠體粒子能透過(guò)半透膜

  D．向煮沸的NaOH溶液中滴加FeCl₃溶液可制備Fe(OH)₃膠體

4．正確掌握好化學(xué)用語(yǔ)是學(xué)好化學(xué)的基礎(chǔ)，下列有關(guān)表述正確的是                       （    ）

A．次氯酸的電子式：   

B．質(zhì)量數(shù)為16的氧原子：

C．乙烯的結(jié)構(gòu)簡(jiǎn)式：

D．碳酸氫根離子的電離方程式： HCO₃^- + H₂O  H₃O⁺+ CO₃^2-－

5．下列物質(zhì)的分類正確的是                                                                                  （    ）

混合物

非電解質(zhì)

堿

酸式鹽

A

漂白粉

Cl₂

氨水

NaHCO₃

B

福爾馬林

苯

Cu₂(OH)₂CO₃

明礬

C

膽礬

SO₂

純堿

NH₄Cl

D

食醋

C₂H₅OH

苛性鉀

NaHSO₄

6．茉莉醛具有濃郁的茉莉花香，其結(jié)構(gòu)簡(jiǎn)式為：

關(guān)于茉莉醛的下列表述不正確的是                                                                   （    ）

A．難溶于水                                          B．屬于芳香烴

C．在一定條件下能發(fā)生氧化反應(yīng)           D．在一定條件下能生成高分子化合物

7．下列排列順序正確的是                                                                                      （    ）

  ①酸性：H₃PO₄ > H₂SO₄ > HClO₄  

  ②熱穩(wěn)定性：H₂O > HF > H₂S  

  ③原子半徑：Na>Mg>O   

  ④還原性：F^－ > Cl^－ > S^2－ 

  ⑤結(jié)合H⁺的能力：OH^－＞CH₃COO^－＞Cl^－

A．③⑤             B．②③               C．①③④          D．②④⑤

8．有關(guān)硫酸銅晶體里結(jié)晶水含量測(cè)定的實(shí)驗(yàn)，下列表述正確的是                          （    ）

  A．將坩堝直接放在三角架上進(jìn)行加熱

  B．坩堝在加熱前未完全干燥，可使測(cè)定的結(jié)果偏低

  C．加熱溫度過(guò)高，使一部分硫酸銅分解，可使測(cè)定結(jié)果偏高

  D．實(shí)驗(yàn)步驟的順序?yàn)椋悍Q量、研磨、加熱、冷卻、稱量、再加熱、冷卻、稱量

9．用N_A代表阿伏加德羅常數(shù)的數(shù)值，下列表述正確的是                                      （    ）

A．等物質(zhì)的量的OH^－與羥基(－OH)所含電子數(shù)相等

B．11.2 g鐵粉與稀硝酸反應(yīng)轉(zhuǎn)移電子數(shù)一定為0.6mol

C．1 L 0.5 mol/L  NaHCO₃溶液中含有HCO₃^-的個(gè)數(shù)為0.5 N_A

D．常溫常壓下，44 g CO₂氣體含有氧原子的個(gè)數(shù)為2 N_A

10．對(duì)于密閉容器中的可逆反應(yīng)：mX (g) + nY(s)  pZ (g)；ΔH<0，達(dá)化學(xué)平衡后，改變條件，下列表述不正確的是                                                                （    ）

A．增大壓強(qiáng)，化學(xué)平衡不一定發(fā)生移動(dòng)

    B．通入氦氣，化學(xué)平衡不一定發(fā)生移動(dòng)

    C．增加X或Y的物質(zhì)的量，化學(xué)平衡一定發(fā)生移動(dòng) 

   D．其它條件不變，升高溫度，化學(xué)平衡一定發(fā)生移動(dòng)

11．有關(guān)下列表述                                                                                                  （    ）

①¹⁶O₂與¹⁸O₂互為同位素

②C₂H₄與C₆H₁₂互為同系物

③淀粉與纖維素互為同分異構(gòu)體

④白磷與紅磷是同素異形體，它們之間的轉(zhuǎn)化是物理變化

⑤碳與硅是同主族元素，故CO₂與SiO₂結(jié)構(gòu)相似，性質(zhì)相似

⑥PCl₃和BCl₃分子中所有原子的最外層都達(dá)到8電子穩(wěn)定結(jié)構(gòu)

A．都不正確        B．只有①③⑤正確  C．只有②④⑤正確 D．只有①②⑥正確

12．下列離子方程式書寫正確的是                                                                        （    ）

A．硫化鈉水解：S^2－＋2H₂O  H₂S↑＋2OH^－

B．碳酸鈉溶于醋酸溶液中：CO₃^2－ ＋ 2 H^＋＝ H₂O ＋ CO₂↑

C．次氯酸鈣溶液中通入過(guò)量二氧化碳：Ca²⁺ + 2ClO^－+H₂O+CO₂ ＝CaCO₃↓+2HClO

D．過(guò)量的硫酸氫鈉與氫氧化鋇溶液反應(yīng)：Ba^2＋＋2OH^－＋2H^＋＋SO₄^2－＝BaSO₄↓＋2H₂O

13．下列表述正確的是                                                                                           （    ）

  A．NaHCO₃溶液中：c(H⁺) + c(H₂CO₃) ＝ c(OH^－)

     B．中和等體積、等pH相同的鹽酸和CH₃COOH溶液所消耗的NaOH物質(zhì)的量相同

  C．pH＝2的HA溶液與pH＝12的MOH溶液以任意比混合后，所得溶液中：

    c(H⁺) + c(M⁺) ＝ c(OH^－) + c(A^－)

D．在水電離出的H^＋濃度為1×10^－12 mol/L的溶液中，K⁺、Mg²⁺、NO₃^－、I^－一定能大量共存

14．下列說(shuō)法正確的是                                                                                           （    ）

A．將氯化鋁和硫酸鋁溶液蒸干灼燒后均得到氧化鋁

B．向足量飽和石灰水中加入0.56 g CaO，可得固體0.74 g

C．由堿金屬元素形成的單質(zhì)熔點(diǎn)隨原子序數(shù)的遞增逐漸降低

D．向稀醋酸中加入醋酸鈉固體，溶液pH升高的主要原因是醋酸鈉水解呈堿性

15．X、Y、Z三種氣體，取X和Y按2∶1的物質(zhì)的量之比混合，放入固定體積的密閉容器中發(fā)生如下反應(yīng)：X + 2Y2Z ，達(dá)到平衡后， X的轉(zhuǎn)化率不可能為         （    ）

  A．25%             B．20%              C．15%              D．10%

第Ⅱ卷（非選擇題 共55分）

16．（共4分）

    某實(shí)驗(yàn)小組為探究ClO^－、I₂、SO₄^2－在酸性條件下的氧化性強(qiáng)弱，設(shè)計(jì)實(shí)驗(yàn)如下：

實(shí)驗(yàn)①：在淀粉碘化鉀溶液中加入少量次氯酸鈉溶液，并加入少量的稀硫酸，溶液立即變藍(lán)；

實(shí)驗(yàn)②：向?qū)嶒?yàn)①的溶液中加入4 mL 0.5 mol/L的亞硫酸鈉溶液，藍(lán)色恰好完全褪去。

     （1）寫出實(shí)驗(yàn)①中發(fā)生反應(yīng)的離子方程式                                       。

 （2）實(shí)驗(yàn)②中化學(xué)反應(yīng)轉(zhuǎn)移電子的物質(zhì)的量是                                  。

 （3）以上實(shí)驗(yàn)說(shuō)明，在酸性條件下ClO^－、I₂、SO₄^2－的氧化性由弱到強(qiáng)的順序是_________________。

17．（共10分）

    元素周期表是學(xué)習(xí)物質(zhì)結(jié)構(gòu)和性質(zhì)的重要工具，下面是元素周期表的一部分，表中所列字母A、D、E、G、Q、M、R、T分別代表某一化學(xué)元素。請(qǐng)用所給元素回答下列問題。

A

D

E

G

Q

M

R

T

   （1）某元素原子的核外電子層數(shù)是最外層電子數(shù)的3倍，該元素的原子結(jié)構(gòu)示意圖為               。

   （2）某些元素的原子可形成與Ar具有相同電子層結(jié)構(gòu)的簡(jiǎn)單離子，這些離子的半徑由大到小的順序是（填離子符號(hào)）                                。

   （3）M、D兩種元素形成的化合物含有的化學(xué)鍵類型是            ，其分子是（填“極性”或“非極性”）       分子；

A分別與D、E、R形成的分子中，分子間存在氫鍵的是（填分子式）           。

A與D形成分子的空間結(jié)構(gòu)可能是（填序號(hào)）                                。

                        a            b             c           d

                                        圖1

   （4）從所給元素中組成合適的反應(yīng)物，用化學(xué)方程式

表明元素M、R的非金屬性強(qiáng)弱：

                                      。

   （5）第三周期主族元素單質(zhì)熔點(diǎn)高低的順序如圖2所

示，“1”所代表物質(zhì)的化學(xué)式是               ，

“7”所對(duì)應(yīng)的元素形成最高價(jià)氧化物的晶體類型

是             。

圖2

18．(共6分)現(xiàn)有濃度均為0.1 mol/L的下列溶液：①硫酸、

②醋酸、③氫氧化鈉、④氯化銨、⑤醋酸銨、⑥硫酸銨、

⑦硫酸氫銨，⑧氨水，請(qǐng)回答下列問題：

   （1）①、②、③、④四種溶液中由水電離出的H⁺濃度由大到小的順序是（填序號(hào)）

                                          。

   （2）④、⑤、⑥、⑦、⑧五種溶液中NH₄⁺濃度由大到小的順序是（填序號(hào)）             。

   （3）將③和④等體積混合后，混合液中各離子濃度由大到小的順序是　　　　　　　。

   （4）已知t℃，K_W＝1×10^－13，則t℃（填“>”或“<”或“＝”）          25℃。在t℃時(shí)將pH＝11的NaOH溶液a L與pH＝1的H₂SO₄的溶液b L混合（忽略混合后溶液體積的變化），若所得混合溶液的pH＝2，則a∶b＝              。

19．（共5分）

在密閉容器中投入一定量的A和B發(fā)生反應(yīng)：m A(g)+n B(g)  EMBED ChemWindow.Document  p C(g)+q D(g)。

   （1）若開始時(shí)加入A物質(zhì)m mol，欲使A與B的轉(zhuǎn)化率相等，則加入B物質(zhì)_______mol 。

   （2）相同的壓強(qiáng)下，充入一定量的A、B后，在不同溫度下C的百分

含量與時(shí)間的關(guān)系如圖3所示。則T₁(填“>”、“<”或“=”)________T₂，

該反應(yīng)的正反應(yīng)的△H(填“>”、“<”或“=”)_________0。

   （3）一定條件下，從正反應(yīng)開始達(dá)到化學(xué)平衡過(guò)程中，混合氣體的平均

相對(duì)分子質(zhì)量隨時(shí)間的變化如圖4所示，測(cè)得達(dá)到平衡時(shí)A、B、C、

D的物質(zhì)的量均為1 mol。

①若在恒溫恒容的條件下，向該平衡體系中再通入A、B、C、D

1 mol，則體系中氣體的平均相對(duì)分子質(zhì)量（填“增大”、“減小”、

“不變”或“無(wú)法確定”）                       。

②若恒溫恒壓的條件下，向原平衡體系中再通入A、B、C、D各1 mol，

則體系中氣體的密度（填“增大”、“減小”、“不變”或“無(wú)法確定”）                。

20．（共8分）A和R在一定條件下可合成芳香族化合物E，已知A可以在一定條件下轉(zhuǎn)化為G，且G在標(biāo)準(zhǔn)狀況下密度為1.25 g/L。各物質(zhì)間相互轉(zhuǎn)化關(guān)系如下圖所示(某些條件已略去)。

圖5

   （1）A中所含官能團(tuán)的名稱為　　　　　　　　　　；①的反應(yīng)類型為　　　　　　。

   （2）②的化學(xué)反應(yīng)方程式為　　　　　　　　　　　　　　　　　　。

　　    M與新制氫氧化銅懸濁液反應(yīng)的化學(xué)方程式                                。

   （3）與E具有相同官能團(tuán)，且苯環(huán)上只有一個(gè)取代基的同分異構(gòu)體還有5種，它們是：

、 、

_________                  _、                             。

21．（共6分）某實(shí)驗(yàn)小組用0.50 mol/L NaOH溶液和0.50 mol/L硫酸溶液進(jìn)行中和熱的測(cè)定。

   Ⅰ．配制0.50 mol/L NaOH溶液

   （1）若實(shí)驗(yàn)中大約要使用245 mL NaOH溶液，至少需要稱量NaOH固體             g。

   （2）從圖6中選擇稱量NaOH固體所需要的儀器是（填字母）：                    。

 圖6

Ⅱ．測(cè)定中和熱的實(shí)驗(yàn)裝置如圖7所示。

   （1）寫出稀硫酸和稀氫氧化鈉溶液反應(yīng)表示中和熱的熱化學(xué)

方程式（中和熱數(shù)值為57.3 kJ/mol）：

                                                  。

   （2）取50 mL NaOH溶液和30 mL硫酸溶液進(jìn)行實(shí)驗(yàn)，實(shí)驗(yàn)  

數(shù)據(jù)如下表。                  

①請(qǐng)?zhí)顚?u>下表中的空白：                                    圖7

     溫度

實(shí)驗(yàn)次數(shù)

起始溫度t₁/℃

終止溫度

t₂/℃

溫度差平均值

（t₂-t₁）/℃

H₂SO₄

NaOH

平均值

1

26.2

26.0

26.1

30.1

2

27.0

27.4

27.2

33.3

3

25.9

25.9

25.9

29.8

4

26.4

26.2

26.3

30.4

②近似認(rèn)為0.50 mol/L NaOH溶液和0.50 mol/L硫酸溶液的密度都是1 g/cm³，中和后生成溶液的比熱容c=4.18 J/(g?℃)。則中和熱△H=                      （取小數(shù)點(diǎn)后一位）。

③上述實(shí)驗(yàn)數(shù)值結(jié)果與57.3 kJ/mol有偏差，產(chǎn)生偏差的原因可能是（填字母）        。

        a．實(shí)驗(yàn)裝置保溫、隔熱效果差

b．量取NaOH溶液的體積時(shí)仰視讀數(shù)

c．分多次把NaOH溶液倒入盛有硫酸的小燒杯中

d．用溫度計(jì)測(cè)定NaOH溶液起始溫度后直接測(cè)定H₂SO₄溶液的溫度

22．（共9分）某課外活動(dòng)小組同學(xué)用右圖裝置進(jìn)行實(shí)驗(yàn)，試回答下列問題。

   （1）若開始時(shí)開關(guān)K與a連接，則B極的電極反應(yīng)式為                            。

   （2）若開始時(shí)開關(guān)K與b連接，則B極的電極反應(yīng)式為                           ，     總反應(yīng)的離子方程式為                                              。

    有關(guān)上述實(shí)驗(yàn)，下列說(shuō)法正確的是（填序號(hào)）            。

  ①溶液中Na⁺向A極移動(dòng)

  ②從A極處逸出的氣體能使?jié)駶?rùn)KI淀粉試紙變藍(lán)

  ③反應(yīng)一段時(shí)間后加適量鹽酸可恢復(fù)到電解前電解質(zhì)的濃度

  ④若標(biāo)準(zhǔn)狀況下B極產(chǎn)生2.24 L氣體，則溶液中轉(zhuǎn)移0.2 mol電子

   （3）該小組同學(xué)模擬工業(yè)上用離子交換膜法制燒堿的方法，那么可以設(shè)想用如圖9裝置電解硫酸鉀溶液來(lái)制取氫氣、氧氣、硫酸和氫氧化鉀。

             圖8                                   圖9

①該電解槽的陽(yáng)極反應(yīng)式為                             。此時(shí)通過(guò)陰離子交換膜的離子數(shù)      （填“大于”或“小于”或“等于”）一通過(guò)陽(yáng)離子交換膜的離子數(shù)。

②制得的氫氧化鉀溶液從出口（填寫“A”、“B”、“C”、“D”）        導(dǎo)出。

③通電開始后，陰極附近溶液pH會(huì)增大，請(qǐng)簡(jiǎn)述原因                        。

④若將制得的氫氣、氧氣和氫氧化鉀溶液組合為氫氧燃料電池，則電池正極的電極反應(yīng)式為                       。

23．（共7分）銅合金是人類使用最早的金屬材料，銅在化合物中的常見化合價(jià)有+l 、+2。已知Cu₂O與稀硫酸反應(yīng)，溶液呈藍(lán)色�，F(xiàn)向Cu、Cu₂O和CuO組成的混合物中，加入1 L 0.6 mol/L HNO₃溶液恰好使混合物溶解，同時(shí)收集到2240 mL NO氣體（標(biāo)準(zhǔn)狀況）。請(qǐng)回答下列問題：

   （1）寫出Cu₂O跟稀硝酸反應(yīng)的離子方程式                           。

   （2）若將上述混合物用足量的H₂加熱還原，所得到固體的質(zhì)量為            。

   （3）若混合物中含0.1 mol Cu，將該混合物與稀硫酸充分反應(yīng)，至少消耗H₂SO₄的物質(zhì)的量為              。

   （4）若混合物中Cu的物質(zhì)的量為n mol，則n的取值范圍為               。

試題詳情

重慶市萬(wàn)州區(qū)2008-2009學(xué)年高三第一次診斷性

語(yǔ) 文

  語(yǔ)文試題分為兩部分，滿分150分，考試時(shí)間150分鐘。

注意事項(xiàng)：

    1．答題前，務(wù)必將自己的姓名、準(zhǔn)考證號(hào)(或?qū)W號(hào))填寫在答題卷規(guī)定的位置上�！�。

    2．所有題目必須在答題卷上作答，在試題卷上答題無(wú)效。

    3．考試結(jié)束后，只上交答題卷(高考除外)。

第一部分  選擇題

試題詳情

重慶市萬(wàn)州區(qū)2008-2009學(xué)年高三第一次診斷性

英語(yǔ)試題

本試卷分第I卷和第II卷兩部分。滿分150分�？荚囉脮r(shí)120分鐘�？荚嚱Y(jié)束后。將本試卷和答題卡一并交回。

注意事項(xiàng)：

1．答卷前，考生務(wù)必用0.5毫米黑色簽字筆將自己的姓名、座號(hào)、準(zhǔn)考證號(hào)填寫在答題卡和試題卷規(guī)定的位置上。

2．第I卷每小題選出答案后，用2B鉛筆把答題卡上對(duì)應(yīng)題目的答案標(biāo)號(hào)涂黑；如需改

   動(dòng)，用橡皮擦干凈后，再選涂其他答案標(biāo)號(hào)。答案不能答在試題卷上。

3．第II卷必須用0.5毫米黑色簽字筆作答，先劃掉原來(lái)的答案，然后再寫上新的答案；

   不準(zhǔn)使用涂改液、膠帶紙、修正帶。不按以上要求作答的答案無(wú)效。

第Ⅰ卷（三部分，共115分）

第一部分：聽力理解(共三節(jié)，滿分30分)

第一節(jié)(共5小題;每小題1.5分，滿分7.5分)

聽下面5段對(duì)話。每段對(duì)話后有一個(gè)小題，從題中所給的A、B、C三個(gè)選項(xiàng)中選出最佳

選項(xiàng)，并標(biāo)在試卷的相應(yīng)位置。聽完每段對(duì)話后，你都有l(wèi)0秒鐘的時(shí)間來(lái)回答有關(guān)小題

和閱讀下一小題。每段對(duì)話僅讀一遍。

例： How much is the shirt?

A. ₤19.15.     B. ₤9.15.     C. ₤9.18.

答案是B.

1. Where does the conversation most probably take place?

    A. In a car.      B. On a plane.      C. On a farm.

2. What do the two speakers mean?

    A. They enjoyed the party.

    B. Their friends seemed rather old.

    C. They met some funny people at the party.

3. What did the woman, want to do?

    A. To celebrate her own birthday.

    B. To give Tom a present for his birthday.

    C. To come to Tom's birthday party.

4. What do we know from the conversation?

    A. Something is wrong with the woman's telephone.

    B. Something is wrong with the man's telephone.

    C. Something is wrong with the woman's TV set.

5. In which direction is the woman going?

    A. The north.    B. The south.   C. In the direction of the bus stop.

第二節(jié)(共15小題；每小題l.5分，滿分22.5分)

請(qǐng)聽下面5段對(duì)話或獨(dú)白，選出最佳選項(xiàng)。

請(qǐng)聽第6段材料，回答第6至8題。

6. Who is the woman?

    A. Mr. Green's secretary.   B. Mr. Smith's secretary.   C. An operator:

7. When will Mr. Green come to Tokyo?

A. In the first week of October.

B. In the middle of November.

C. At the beginning of December.

8. How long will the conference last?

    A. A week.      B.3 days.      C.5 days.

請(qǐng)聽第7段材料，回答第9至11題。

9.What can we learn about the couple?

A. The husband likes to sit in the same chair.

B. The wife doesn't like to travel.

    C. They are going to have a trip.

10. How long did the last vacation they talked about last?

     A.10 days.      B.10 weeks.      C.3 or 4 weeks.

11. Why doesn't the wife like the kind of vacation the husband mentions?

     A. It may cost a lot of money.

     B. She doesn't like to go to so many places.

     C. She dislikes going to many places and it may cost her a lot.

請(qǐng)聽第8段材料，回答第l2、l3題。

12. Why can't the man wait to see the dentist?

     A. He doesn't have an appointment.

B. He has a terrible toothache.

     C. He doesn't have any medicine.

13. What day is today?

     A. Saturday.            B. Sunday.       C. Monday.

請(qǐng)聽第9段材料，回答第14至17題。

14. When does this conversation take place?

     A. On Wednesday.  B. On Thursday.    C. On Friday.

15. What is the name of the play that the two speakers are going to watch?

      A. Twelfth Night.

      B. The Police and The Thief.

C. The Bicycle Thief.

16: Where will the play be put on?

     A. In the classroom.

     B. At the Shakespeare Theatre.

C. At the police station.

17. What's the play about?

     A. The police.   B. The thief.     C. The police and the thief.

請(qǐng)聽第10段材料，回答第18至20題。

Why couldn't I meet Mr. Jordan when I arrived ? Because I was______.

Did I try to call Mr. Jordan?   Yes. I called him during       hours.

What did I find when returning to the hotel?    I found a        .

第二部分：?jiǎn)雾?xiàng)選擇(每題一分。共15分)

21. Lang Ping, who is said to have started her coaching career in, Turkey,      volleyball in China for almost twenty years.

     A. played              B. have played       C. was playing     D. had played

22. ---Have you got any plans for the coming birthday?

    --- Yes.      , I'm going to try bungee jumping.

     A. If not         B. If busy       C. If anything    D. If possible

23. It's impossible for all the people to get jobs because      of them are not fit for them.

     A. none            B. all              C. not all           D. every one

24. it is reported that some mainland visitors to Hong Kong Disneyland didn't      the park rules and behaved improperly.

     A. keep to       B. get across         C. take up        D. make up

25.  ---Shall we go skating tonight?

    ---Sorry. This is not the right      . I'm too tired to walk.

     A. situation          B. chance     C. moment     D. place

26. --- My boy's name is Jonathan. Shall I spell it for you?

---      .

    A. If you don't mind        B. Not at all      C. It doesn't matter   D. take it easy

27.       branch fell from the tree and hit her on      head in the thunderstorm.

    A. A; the           B. The; the         C. A; /             D. The; /

28. Why didn't you tell me there was no meeting today? I       all the way here through the heavy snow.

    A. needn't have driven                       B. can't have driven

    C. mustn't have driven                       D. shouldn't have driven

29. Joseph is a careful driver, but he drives      of my friends.

A. more carefully    B. the most carefully   C. less carefully    D. the least carefully

30. Scientists photographed for the first time ever      wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.

    A. which            B. what           C. that             D. when

31. Her shoes      her dress: they look very well together.

    A. suit          B. fit           C. compare       D. match

32. ---Come on, please give me some ideas about the project.

   ---Sorry. With so much work      my mind, I almost break down.

    A. filled        B. filling      C. to fill         D. being filled

33. Three minutes earlier,      they could have escaped such a disaster.

    A. so             B. but               C. and            D. that

34. They      two air-plane tickets to Tibet for free, or they'd never have managed to afford such an expensive trip.

    A. had received   B. received    C. have received    D. receive

35. ---Are you ready for Hong Kong?

   ---Yes. I want my kids to experience that      they are young.

    A. while         B. until               C. if             D. before

第三部分 完形填空(共20小題；每小題l.5分，滿分30分)

閱讀下面短文，從短文后所給各題的四個(gè)選項(xiàng)(A、 B、C、D)中，選出可以填入空白處的最佳選項(xiàng)。                                            

A Box of Cookies

   A small boy at summer camp received a large package of cookies in the mail from his mother. He ate a few, and then  36  the remainder under his bed. The next day, he found the box was   37   .

   That afternoon a camp leader, who had been 38  of the theft(偷竊), saw another boy sitting behind a tree eating the stolen cookies. " 39  young man," he said to himself, "must be  40  not to steal."

   He returned to the group and   41  the boy whose cookies had been stolen. "Billy," he said, "I  42  who stole your cookies. Will you help me give him a lesson?"

   "Well, yes--but aren't you going to   43   him?" asked the boy.

   "No, that   44   only make him angry and hate you," the leader  45   "I want you to call your mother and ask her to  46  you another box of cookies."

   A few days later the boy received another box of cookies.

   "Now," said the leader, "the boy who stole your cookies is down by the lake, Go and share your  47  with him."

  "But, he's the thief." said the  48   boy." I know. But  49  it--see what happens." Half an hour later the camp leader saw the two come  50  the hill, arm in arm. The boy who had stolen the cookies was  51  trying to get the other to accept his jackknife in payment  52  the stolen cookies, and Billy was just as earnestly(真誠(chéng)的)  53  the gift from his new friend, 54  that a few old cookies weren't that  55  anyway.

  36. A. took       B. placed          C. loaded      D. lay

  37. A. broken     B. opened          C. touched     D. gone

  38. A. told        B. asked           C. heard       D. warned

39. A. Any        B. Either           C. That        D. Every

40. A. encouraged B. ordered          C. allowed      D. taught

41. A. sought out  B. turned out       C. gave out     D. set out

42. A. understand B. know            C. recognize    D. realize

43. A. beat       B. find            C. punish      D. catch

44. A. must       B. shall            C. need         D. would

45. A. explained   B. argued          C. insisted     D. promised

  46. A. leave       B. send            C. take        D. find

47. A. ideas       B. cookies          C. lessons      D. toys

48. A. interested   B. worried         C. stolen       D. puzzled

  49. A. face       B. make           C. try         D. show

  50. A. up         B. back            C. down        D. through

51. A. carefully    B. interestedly      C. sincerely     D. quickly

52. A. to         B. for             C. of          D. with

  53. A. returning   B. checking        C. refusing     D. thanking

54. A. expecting   B. hoping          C. saying       D. meaning

55. A. much      B. bad             C. expensive    D. important

第四部分：閱讀理解(每題2分，共40分)

A

    Margaret, married with two small children, has been working for the last seven years as a night cleaner, cleaning offices in a big building.

    She trained as a nurse, but had to give it up when her elder child became seriously ill. "I would have liked to go back to it, but the shifts (工作班次) are all wrong for me, as I have to be home to get the children up and off to school."

    So she works as a cleaner instead, from 9 p.m. till 6 a.m. five nights a week for just ₤90, before tax and insurance. "It's better than it was last year, but I still think that people who work 'unsocial hours' should get a bit extra."

    The hours she's chosen to work mean that she sees plenty of the children, but very little of her husband. However, she doesn't think that puts any pressure on their relationship.

    Her work isn't physically very hard, but it's not exactly pleasant, either. "I do get angry with people who leave their offices like a place for raising pigs. If they realized people like me have to do it, perhaps they'd be a bit more careful."

    The fact that she's working all night doesn't worry Margaret at all. Unlike some dark buildings at night, the building where she works is fully lit, and the women work in groups of three. "Since I've got to be here, I try to enjoy myself- and I usually do, because of the other girls. We all have a good laugh, so the time never drags."

    Another challenge Margaret has to face is fine reaction of other people when she tells them what she does for a living. "They think you're a cleaner because you don't knowhow to read and write," said Margaret, "I used to think what my parents would say if they knew what I'd been doing, but I don't think that way any more. I don't dislike the work though I can't say I'm mad about it."

  50. Margaret quit her job as a nurse because________.

      A. she wanted to earn more money to support her family

B. she had suffered a lot of mental pressure

      C. she needed the right time to look after her children

D. she felt tired of taking care of patients

57. Margaret gets angry with people, who work in the office because

      A. they never clean their offices

B. they look down upon cleaners

      C. they never do their work carefully

      D. they always make a mess in their offices

58. When at work, Margaret feels________.

      A. light-hearted because of her fellow workers

B. happy because the building is fully lit

      C. tired because of the heavy, workload

D. bored because time passes slowly

59. The underlined part in the last paragraph implies that Margaret's parents would________.

      A. help care for her children          B. regret what they had said

C. show sympathy for her            D. feel disappointed in her

B

     Federal regulators Wednesday approved a plan to create a nationwide emergence alert (警報(bào)) system using text messages delivered to cell phones.

     Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry's trade association, CTIA, estimates (估計(jì)) more than 48billion text messages are sent each month.

     The plan comes from the Warning Alert and Response Network Act, a 2006 federal law that requires improvements to the nation's emergency alert system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alert the public about emergencies.

     "The, ability to deliver accurate and timely warnings and alerts through cell phone sand other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies," FCC Chairman Kevin Martin said following approval of the plan.

     Participation in the alert system by carriers -telecommunications companies is voluntary, but it has received solid support from the wireless industry.

     The program would be optional for cell phone users. They also may not be charged for receiving alerts.

     There would be three different types of messages, according to the rules.

     The first would be a national alert from the president, likely involving a terrorist attack or natural disaster. The second would involve "approaching threats," which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架) emergencies, or so-called Amber Alerts.

      The service could be in place by 2010.

60. What is the purpose of the approved plan?

A. To warn people of emergencies via messages.

B. To popularize the use of cell phones.

    C. To estimate the monthly number of messages.

D. To promote the wireless industry.

61. The improvement to the present system is in the charge of________.

 A. CTIA              B the Warning Alert and Response Network

C. FCC               D. federal regulators

62. An alert message will NOT be sent if________.

A. a child loses his way

 B. a university shooting happens

C. a natural disaster happens

 D. a terrorist attack occurs

63. Which of the following would be the best title for the text?

A. Cell Phone Alerts Protecting Students

 B. Cell Phone Alerts by Wireless Industry

C. Cell Phone Alerts of National Disasters

D. Cell Phone Alerts Coming Soon

C

Dear Alice,

    My name is Lisa. I have social anxiety, disorder and was wondering how it would be possible to see someone for help without my parents knowing about it. I know that they'd be anything but supportive. They would think I'm absolutely out of my mind. The truth is, I've put off dealing with it, acting as if it'll just go away or that I'll outgrow it. But in reality, the older I'm getting, the worse I'm getting. I avoid as many social situations as I can. I completely panic when meeting new people, I only stay in classes that don't require any talking on my part. It seems the only place I'm actually happy is at home or with people that I've known all my life. Hope you can help!

Dear Lisa,

    About 5 million Americans have some form of social anxiety disorder, also known as social phobia. While everyone experiences nervousness or fear in social situations to a certain extent, those with social anxiety disorder are weakened by their fear. They may have a constant, intense, and lasting fear of being watched and judged by others, or be terribly afraid of being embarrassed or laughed at by ways in which they behave. As you have described, this fear can prevent people with social anxiety disorder from doing everyday activities, such as going to school or work, and can become so much of a focus that they limit their socializing.

    It's understandable that you are worried about how your parents might react to knowing what's been going on for you. Many people think that their families will blame them for how they're feeling or belittle their concerns. Being honest with your parents, however, might help you to feel more at ease; it's possible that they've noticed your behavior and wondered about it, or even struggled with similar feelings themselves. There's even some evidence that anxiety disorders may be genetic or run in families ―perhaps due to environmental factors and patterns expressed through interpersonal interactions.

64. The problem of Lisa is that________.

A. She is not getting along well with her parents.

B. She becomes nervous meeting people

C. She always puts off dealing with her problems.

D. She fears social occasions

65. According to Lisa, her parents________.

A. has never supported her

 B. are eager to know what's going on for her

 C. are perhaps struggling with similar feelings

D. may criticize her for her trouble

66. In her letter, Alice first talked about________.

 A. the possible causes of Lisa's problem

B. the effects of social phobia

 C. people's attitudes towards nervousness

 D. everyone's experience of social anxiety disorder

67. The underlined word "belittle" probably means________.

A. express     B. hide     C. ignore       D. worry

D

    We can see how the product life cycle works by looking at the introduction of instant(速溶) coffee. When it was introduced, most people did not like it as well as "regular" coffee, and it took several years to gain general acceptance (introduction stage).At one point, though, instant coffee grew rapidly in popularity, and many brands were introduced (stage of rapid growth). After a while, people became attached to one brand and sales leveled off (stage of maturity). Sales went into a slight decrease when freeze-dried coffees were introduced (stage of decline).

    The importance of the product life cycle to marketers is this: Different stages in the product life cycle call for different strategies. The goal is to extend product life so that sales and profits do not drop. One strategy is called market modification. It means that marketing managers look for new users and market sections. Did you know, for example, that the backpacks that so many students carr3 today were originally designed for the soldiers？

    Market modification also means searching for increased usage among present customers or going for a different market, such as senior citizens. A marketer may re-position the product to appeal to new market sections.

    Another product extension strategy is called product modification. It involves changing product quality, features, or style to attract new users or more usage from present users. American auto manufacturers are using quality improvement as one way to regain world markets. Note, also, how auto manufacturers once changed styles eagerly from year to year to keep demand from falling.

 68. The first paragraph tells us that a new product is ________.

A. not easily accepted by the public

 B. often of poorer quality compared with old ones

C. often more expensive than old ones

 D. usually introduced to satisfy different tastes

69. Marketers need to know which of the four stages a product is in so as to________.

A. promote its production

 B. work out marketing plans

C. speed up its life cycle

 D. increase its popularity

70. The author mentions the example of "backpacks" (Para.2) to show the importance of________.

 A. pleasing the young as well as the old

B. increasing usage among students

 C. exploring new market sections

 D. finding creative product designers

71. In order to attract more consumers, U.S. auto makers are ________.

A. modernizing product style

 B. increasing product features

 C. developing products of better quality

 D. re-positioning their product in the market

E

    George, when your big brother and your little dog and I walked you up to school today, you had no idea how I was feeling.

    You were so excited. You had packed and unpacked your pencils and safety scissors in your backpack a dozen times. I am really going to miss those lazy mornings when we waved your brother and sister off to school.

     Because you are my youngest, I had learned a few things by the time you came along. I found out that the seemingly endless days of babyhood are gone like lightning. I blinked(眨眼), and your older siblings(兄弟姐妹) were setting off for school as eagerly as you did this morning, I was one of the lucky ones; I could choose whether to work or not. By the time it was your turn. the shining prizes of career advancement and a double income had lost their brightness. A splash(濺水) in the pool with you in your bright red boots or "just one more" rereading of your favorite book, Frog and Toad Are Friends, meant more. You didn't go to preschool and I hope that doesn't hold you back. You learned numbers by helping me count the soda cans we returned to the store.

     I have to admit that in my mind's eye, an image of myself while you're in school has developed, I see myself updating all the photo albums and starting that novel I always wanted to write. As the summer wound down and more frequent quarrels erupted between you and your siblings, I was looking forward to today. And then this morning, I walked you up the steep hill to your classroom and you gave me one of your characteristically fierce, too-tight hugs. This time you were ready to let go before I was.

     Maybe someday you will deliver a kindergartner to the first day of school. When you turn at the door to wave good-bye, he or she will be too deep in conversation with a new friend to notice. Even as you smile, you'll feel something warm on your cheek...

72.What does the underlined sentence mean in the third paragraph?

     A. When you reach the school age

     B. When you decide whether to work or not

C. When you were born

     D. When you have your own, family

73.Which sentence from the passage best describes how the writer felt on that morning?

     A. An image of myself while you're in school has developed.

B. I was looking forward to today.

     C. I was one of the lucky ones.

     D. This time you were ready to let go before I was.

74.Which statement is NOT true about George's family according to the letter?

     A. George's parents gave birth to three children

B. The Georges is a double income family

     C. They recycle soda cans

     D. The children had more arguments during the summer

75.The passage tries to show us ________.

     A. how excited a child will be on his first day to school

B. how deeply a mother loves her child

     C. how many efforts a mother has made to raise a child

     D. how a mother plans her future life after her children go to school

第二部分(非選擇題，共35分)

試題詳情

重慶市萬(wàn)州區(qū)2008-2009學(xué)年高三第一次診斷性

理科綜合能力測(cè)試

   注意事項(xiàng)：

1，本試卷分第Ⅰ卷(選擇題)和第Ⅱ卷(非選擇題)兩部分。滿分300分，考試時(shí)間為150分鐘。

2．答第工卷前，考生務(wù)必將自己的姓名、考號(hào)、考試科目填寫在答題卡上。

3．第Ⅰ卷每小題選出答案后，請(qǐng)將答案填入答題卡上對(duì)應(yīng)題目的答案框內(nèi)，不能答在試卷上。

4．第二部分各題的答案，必須答在答題卡規(guī)定的地方。要求卷面整潔，字跡工整。

    相對(duì)原子質(zhì)量：H―1 C―12  Na―23  O―16  Si―28  Cl―35、5  K―39  I―127

第Ⅰ卷(選擇題，共126分)

試題詳情

重慶市萬(wàn)州區(qū)2008-2009學(xué)年高三第一次診斷性

文科綜合能力測(cè)試

    本試卷分第1卷(選擇題)和第Ⅱ卷(非選擇題)兩部分，共8頁(yè)。滿分300分�？荚嚂r(shí)間150分鐘。

    注意事項(xiàng)：

  1．答第Ⅰ卷前，考生務(wù)必將自己的姓名、考號(hào)等寫在答題卡上。   

  2．選擇題選出答案后，請(qǐng)將答案的英文字母填入答題卡上對(duì)應(yīng)題號(hào)下的答案框內(nèi)，不能答在試題卷上。

  3．第Ⅱ卷各題的答案，必須答在答題卡規(guī)定的地方。要求卷面整潔，字跡工整。

  4．考試結(jié)束，只交答題卡。

第Ⅰ卷(選擇題，共140分)

試題詳情

重慶市萬(wàn)州區(qū)2008-2009學(xué)年高三第一次診斷性

數(shù)  學(xué)(理科)

本試卷分第I卷(選擇題)和第II卷(非選擇題)兩部分.全卷共三個(gè)大題，22個(gè)小題，滿分150分，考試時(shí)間為120分鐘.

注意事項(xiàng)：

1．答卷前，考生務(wù)必將自己的學(xué)校、班級(jí)、姓名、考號(hào)填寫在答題卷上.

2．第I卷每小題選出答案后，用筆填寫在答題卷上“第I卷答題欄”對(duì)應(yīng)題目的答案欄內(nèi).不能答在試題紙上.

3．第II卷各題一定要做在答題卷限定的區(qū)域內(nèi).

參考公式：

如果事件A、B互斥，那么P(A＋B)＝P(A)＋P(B)                        

如果事件A、B相互獨(dú)立，那么P(A?B)＝P(A)?P(B)                  

如果事件A在一次試驗(yàn)中發(fā)生的概率是P，那么n次獨(dú)立重復(fù)試驗(yàn)中恰好發(fā)生k次的概率

第I卷（選擇題，共50分）

試題詳情

重慶市萬(wàn)州區(qū)2008-2009學(xué)年高三第一次診斷性

數(shù)  學(xué)（文科）

本試卷分第I卷(選擇題)和第II卷(非選擇題)兩部分.全卷共三個(gè)大題，22個(gè)小題，滿分150分，考試時(shí)間為120分鐘.

注意事項(xiàng)：

1．答卷前，考生務(wù)必將自己的學(xué)校、班級(jí)、姓名、考號(hào)填寫在答題卷上.

2．第I卷每小題選出答案后，用筆填寫在答題卷上“第I卷答題欄”對(duì)應(yīng)題目的答案欄內(nèi).不能答在試題紙上.

3．第II卷各題一定要做在答題卷限定的區(qū)域內(nèi).

參考公式：

如果事件A、B互斥，那么P(A＋B)＝P(A)＋P(B)                        

如果事件A、B相互獨(dú)立，那么P(A?B)＝P(A)?P(B)                  

如果事件A在一次試驗(yàn)中發(fā)生的概率是P，那么n次獨(dú)立重復(fù)試驗(yàn)中恰好發(fā)生k次的概率

第I卷（選擇題，共60分）

試題詳情

2009年外研高考英語(yǔ)模擬試題(一)

Class                           Name               Marks           （滿分120分）

試題詳情

2009年安慶市初三模擬考試（一模）化學(xué)試題

命題：安慶市中考命題研究課題組

可能用到的相對(duì)原子質(zhì)量： Mg-24  O-16  Cl-35.5  H-1

試題詳情

北京市第四中學(xué)2009屆高三上學(xué)期期中考試

理科綜合能力測(cè)試題（化學(xué)部分）

6．恒溫、恒壓下，1molA和nmolB在一個(gè)容積可變的容器中發(fā)生如下反應(yīng)：A(g)+2B(g)  2C(g)，一段時(shí)間后達(dá)到平衡，生成amolC，則下列說(shuō)法中正確的是

A．物質(zhì)A、B的轉(zhuǎn)化率之比為1：2

B．起始時(shí)刻和達(dá)平衡后容器中混合氣體密度相等

C．當(dāng)V_正(A)=2V_逆(C)時(shí)，可斷定反應(yīng)達(dá)到平衡狀態(tài)

D．若起始時(shí)放入3molA和3nmolB，則達(dá)平衡時(shí)生成3amolC

7．下列各元素中，一定屬于主族元素的是

A．X元素能形成+7價(jià)的含氧酸及其鹽

B．Y元素原子最外層電子數(shù)為2

C．Z元素的陰離子與同一周期稀有氣體元素的原子電子層結(jié)構(gòu)相同

D．R元素的最高價(jià)氧化物是酸性氧化物

8．設(shè)N_A為阿伏加德羅常數(shù)的值，下列有關(guān)敘述不正確的是

A．在標(biāo)準(zhǔn)狀況下，V升 SO₃含氧原子個(gè)數(shù)是3V/22.4

B．常溫常壓下，1mol重水 所含電子總數(shù)為10N_A

C．金剛石中，碳原子數(shù)與碳碳共價(jià)鍵數(shù)之比為1：2

D．常溫常壓下，N_A個(gè)甲烷分子體積大于22.4 L

9．下列離子方程式中，不正確的是

A．FeCl₃溶液中加入鐵粉：2Fe³⁺+Fe=3Fe²⁺

B．次氯酸鈣溶液中通入適量的SO₂：Ca²⁺+2ClO^―+SO₂+H₂O=CaSO₃↓+2HClO

C．氨氣通入醋酸溶液中：CH₃COOH+NH₃===CH₃COO^―+NH₄⁺

D．在FeBr₂溶液中通入足量的Cl₂：2Fe²⁺+4Br^―+3Cl₂=2Fe³⁺+2Br₂+6Cl^―

10．下列有關(guān)物質(zhì)的用途正確的是

①碘酒可作為醫(yī)用消毒劑  ②明礬可作為凈水劑  ③Cl₂可用于制備漂白粉

④純凈的碳酸鋇可作為醫(yī)用“鋇餐”  ⑤二氧化硫可作為漂白劑

A．①②③          B．①②③④         C．①②③⑤         D．全部

11．常溫下，向0.1mol下列物質(zhì)①過(guò)氧化鈉②硫酸鋇③硫化鈉④偏鋁酸鈉⑤氯化鋁中分別加入0.5L水后充分?jǐn)嚢瑁瑒t溶液中陰離子數(shù)從大到小的排列順序正確的是

A．⑤①③④②                          B．⑤②①③④

C．⑤①④③②                          D．②⑤①③④

12．下列說(shuō)法中正確的是

A．分子內(nèi)脫去一個(gè)小分子的反應(yīng)一定是消去反應(yīng)

B．可用濃溴水除去苯中混有的苯酚

C．膠體是一種較穩(wěn)定的分散系，可用滲析法從膠體中分離出離子或小分子

D．向鹵代烴水解后的溶液中直接加入硝酸銀溶液，可以確定鹵代烴中含有的鹵元素

13．

A．①④       B．②④     C．①③      D．③④w.w.w.k.s.5.u.c.o.m

26．（16分）已知A、B、C、D均為短周期元素，它們的原子序數(shù)依次遞增。A是最外層為一個(gè)電子的非金屬，C原子的最外層電子數(shù)是次外層的3倍；C和D可形成兩種固體化合物，其中一種為淡黃色固體；B和C可形成多種氣態(tài)化合物。由A、B、C三種元素可形成離子晶體，該晶體中各元素原子的物質(zhì)的量之比為A∶B∶C = 4∶2∶3。請(qǐng)回答下列問題：

⑴寫出C和D形成的淡黃色固體化合物的電子式               。

⑵元素原子的物質(zhì)的量之比為A∶B∶C = 4∶2∶3的晶體名稱為            ，其水溶液顯        性，其反應(yīng)的離子方程式為                          。

⑶請(qǐng)寫出與A₂C和BA₃分子中電子數(shù)相同，且仍由A、B、C元素中任意兩種元素組成的粒子的符號(hào)（舉兩例）               、             。

⑷寫出由B、C元素組成元素原子質(zhì)量比為B∶C=7∶12的化合物的化學(xué)式   。

27．（15分）現(xiàn)有pH=2的醋酸溶液甲和pH=2的鹽酸乙，請(qǐng)根據(jù)下列操作回答問題：

⑴取10 mL的甲溶液，加入等體積的水，醋酸的電離平衡        移動(dòng)（填“向左”、“向右”或“不”）；另取10 mL的甲溶液，加入少量無(wú)水醋酸鈉固體（假設(shè)加入固體前后，溶液體積保持不變），待固體溶解后，溶液中c(H⁺)/ c(CH₃COOH)的比值將         （填“增大”、“減小”或“無(wú)法確定”）。

⑵相同條件下，取等體積的甲、乙兩溶液，各稀釋100倍。稀釋后的溶液，其pH大小關(guān)系為：pH（甲）       pH（乙）（填“大于”、“小于”或“等于”）。

⑶各取25mL的甲、乙兩溶液，分別用等濃度的NaOH稀溶液中和至pH=7，則消耗的NaOH溶液的體積大小關(guān)系為：V(甲)        V(乙) （填“大于”、“小于”或“等于”）。

⑷取25 mL的甲溶液，加入等體積pH=12的NaOH溶液，反應(yīng)后溶液中c(Na⁺)、 c(CH₃COO^－)的大小關(guān)系為：c(Na⁺)        c(CH₃COO^－)（填“大于”、“小于”或“等于” ）。

28．（18分）化合物A、B均是分子式為C₈H₈O₃的無(wú)色液體，均難溶于水。從A、B開始，可發(fā)生圖示的一系列反應(yīng)(反應(yīng)中的無(wú)機(jī)物已全部略去)，E的苯環(huán)上的一元硝基化合物只有兩種，K可發(fā)生銀鏡反應(yīng)。

⑴寫出A和K的結(jié)構(gòu)簡(jiǎn)式：A                    K                

K與G中相同的官能團(tuán)的名稱是：                   

⑵上圖a―i的反應(yīng)中，屬于酯化反應(yīng)的有                             。

⑶寫出反應(yīng)e的化學(xué)方程式：                                      。

寫出反應(yīng)c的化學(xué)方程式：                                      。

⑷已知充分燃燒1g 液態(tài)F時(shí)生成CO₂氣體和液態(tài)水，放出akJ熱量，則F燃燒的熱化學(xué)方程式是：                                             。

29．（11分）Ⅰ．t℃時(shí)，甲、乙兩個(gè)燒杯中各盛有100 g（密度為1.10 g/cm³）相同濃度的KCl溶液�，F(xiàn)將甲燒杯中的溶液蒸發(fā)掉35.0 g H₂O，恢復(fù)到t℃時(shí)，析出KCl固體5.0 g；乙燒杯中的溶液蒸發(fā)掉45.0 g H₂O，恢復(fù)到t℃時(shí)，析出KCl固體10.0 g。

⑴t℃時(shí)，KCl的溶解度為             。

⑵乙燒杯中剩余KCl溶液的物質(zhì)的量濃度         甲燒杯中剩余KCl溶液的物質(zhì)的量濃度（大于、小于、等于）

Ⅱ．在一定溫度下，2SO₂(g)+O₂(g)2SO₃(g)；△H＝一196.6 kJ／mol。向一個(gè)容積不變的容器中，充入2 mol SO₂和1 mol O₂，使之充分反應(yīng)，熱量變化與△H相比較        （大于、等于、小于），原因是：                            。

試題詳情