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IAL U4 June 2014

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?2014 Pearson Education Ltd.

6/6/6/1/

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Instructions

t Use black ink or ball-point pen.

t Fill in the boxes at the top of this page with your name,

centre number and candidate number.

t Answer all questions.

t A nswer the questions in the spaces provided

– there may be more space than you need.

Information

t The total mark for this paper is 90.

t T he marks for each question are shown in brackets

– use this as a guide as to how much time to spend on each question.

t Q uestions labelled with an asterisk (*) are ones where the quality of your

written communication will be assessed

– y ou should take particular care with your spelling, punctuation and grammar, as

well as the clarity of expression, on these questions.

t A Periodic Table is printed on the back cover of this paper.

Advice

t Read each question carefully before you start to answer it.

t Keep an eye on the time.

t Try to answer every question.

t Check your answers if you have time at the end.

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19 (a) A student investigated the kinetics of the reaction in which an acidified, aqueous

solution of hydrogen peroxide oxidizes iodide ions to iodine.

H 2O 2(aq) + 2H +(aq) + 2I –(aq) ? 2H 2O(l) + I 2(aq)

(i) The results of three experiments are shown in the table below.Experiment number

[H 2O 2(aq)]/ mol dm –3

[H +(aq)]/ mol dm –3

[I –(aq)]/ mol dm –3

Initial rate of reaction

/ mol dm –3 s –1

10.5 1.00.57.0 u 10–62

1.0

1.00.5 1.4 u 10–5

3 0.5

2.0

0.5

7.0 u 10–6

Determine the order with respect to hydrogen peroxide and H +(aq) ions.

Explain your reasoning.(3)

Order with respect to H 2O 2(aq)

....................................................................................................................................................................................................................................................................................

Order with respect to H +(aq)

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(ii) The student carried out three more experiments in which the initial

concentrations of hydrogen peroxide and H +(aq) ions were kept constant and the initial concentration of iodide ions was changed.

A graph of the results is shown below.

State the order with respect to I –(aq) and explain your reasoning.

(2)

(iii) Use your answers to (a)(i) and (a)(ii) to write the rate equation for the reaction.

(1)

(iv) Use the data from the table and your answer to (a)(iii) to calculate the value

for the rate constant. Include units in your answer.

(2)

Initial rate / mol dm –3 s –1

[I –(aq)] / mol dm –3

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(b) Nitrogen dioxide reacts with carbon monoxide.

NO 2(g) + CO(g) ? NO(g) + CO 2(g)

The reaction is second order with respect to nitrogen dioxide, and zero order with respect to carbon monoxide.

(i) Suggest a possible two-step mechanism for this reaction.

Write the rate determining step first.

(2)

Rate determining step

Step 2

(ii) Calculate the standard entropy change of the system, ?S 9

system , for the reaction

between nitrogen dioxide and carbon monoxide at 298 K. Include a sign and units in your answer.

You will need to use the standard molar entropies on pages 20 and 27 of the Data Booklet.

(2)

(iii) Given that ?H 9

298 for the reaction between nitrogen dioxide and

carbon monoxide at 298 K is –226 kJ mol –1, calculate the standard entropy

change of the surroundings, ?S 9

surroundings , for this reaction at 298 K. Include a sign and units in your answer.

(2)

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(iv) Calculate the total entropy change, ?S 9

total , for this reaction at 298 K.

State what the sign of ?S 9

total indicates about this reaction at 298 K.

(2)

(Total for Question 19 = 16 marks)

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20 Propanal, CH 3CH 2CHO, is used in the chemical industry in the manufacture of plastics,

and as a disinfectant and preservative. (a) (i) Give the mechanism for the reaction between propanal and hydrogen

cyanide in the presence of potassium cyanide.

Include the dipole on the carbonyl group.

(4)

(ii) Classify the type and mechanism of the reaction between propanal and

hydrogen cyanide.

(2)

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propan-2-ol, in the presence of an acid catalyst, showing the structure of the organic product.

State symbols are not required.

(2)

(d) A sample of propanoic acid was reduced to form compound Q .

The infrared spectrum of compound Q is shown below.

Use the infrared spectrum to identify compound Q .

Explain your reasoning, quoting suitable data.

(2)

(Total for Question 20 = 13 marks)

100

4000

3000

2000

1500

1000

500

0Wavenumber / cm –1

Transmittance / %

2015年6月大学英语六级真题及答案(第三套)

2015年6月英语六级真题及答案（第三套） Part I Writing (30 minutes) Directions: For this part, you are allowed 30 minutes to write an essay commenting on the saying “If you cannot do great things, do small things in a great way. ’’You can cite examples to illustrate your point of view. You should write at least l50 words but no more than 200 words. 注意: 此部分试题请在答题卡1上作答。 Part II Listening Comprehension (30 minutes) Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or, more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D and decide which is the best answer. Then mark the corresponding letter on Answer Sheet, with a single line through the centre. 注意: 此部分试题请在答题卡1上作答。 1．A. The man might be able to play in the World Cup. B. The man’s football career seems to be at an end. C. The man was operated on a few weeks. D. The man is a fan of world famous football players. 2．A. Work out a plan to tighten his budget. B. Find out the opening hours of the cafeteria. C. Apply for a senior position in the restaurant. D. Solve his problem by doing a part time job. 3．A.A financial burden. B. A good companion. C. A real nuisance. D.A well trained pet. 4．A. The errors will be corrected soon. B. The woman was mistaken herself. C. The computing system is too complex. D. He has called the woman several times. 5．A. He needs help to retrieve his files. B. He has to type his paper once more. C. He needs some time to polish his paper. D. He will be away for a two-week conference. 6．A. They might have to change their plan. B. He has got everything set for their trip. C. He has a heavier workload than the woman. D. They could stay in the mountains until June 8. 7．A. They have to wait a month to apply for a student loan. B. They can find the application forms in the brochure. C. They are not eligible for a student loan. D. They are not late for a loan application.

2014年6月大学英语六级真题及答案最全.doc

Part I Writing ( 30minutes) 1、Directions: For this part, you are allowed 30 minutes to write an essay explaining why it is unwise to put all your eggs in one basket. You can give examples to illustrate your point .You should write at least 150 words but no more than 200 words. 2、Directions: For this part, you are allowed 30 minutes to write an essay explaining why it is unwise a person by their appearance. You can give examples to illustrate your point .You should write at least 150 words but no more than 200 words.（小编写的就是这篇，还行~~） 3、Directions: For this part, you are allowed 30 minutes to write an essay explaining why it is unwise to jump to conclusions upon seeing or hearing something. You can give examples to illustrate your point .You should write at least 150 words but no more than 200words. Part Ⅲ Reading Comprehension (40 minutes) For investors who desire low risk and guaranteed income, US government bonds are a secure investment because these bonds have the financial backing and full faith and credit of the federal government. Municipal bonds, also secure, are offered by local governments and often have___ 36___such as tax-free interest. Some may even be___37___. Corporate bonds are a bit more risky. Two questions often___38___first-time corporate bond investors. The first is “If I purchase a corporate bond, do I have to hold it until the maturity date?” The answer is no. Bonds are bought and sold daily on___39___securities exchanges. However, if you decide to sell your bond before its maturity date, you’re not guaranteed to get the face value of the bond. For example, if your bond does not have___40___ that make it attractive to other investors, you may be forced to sell your bond at a___ 41___, i.e., a price less than the bond's face value. But if your bond is highly valued by other investors, you may be able to sell it at a premium, i. e ., a price above its face value. Bond prices generally___42___inversely (相反地) with current market interest rates. As interest rates go up, bond prices fall, and vice versa (反之亦然）. Thus, like all investments, bonds have a degree of risk. The second question is “ How can I___43___the investment risk of a particular bond issue?” Standard & Poor's and Moody’s Investors Service rate the level of risk of many corporate and government bonds. And___44___, the higher the market risk of a bond, the higher the interest rate. Investors will invest in a bond considered risky only if the 45 return is high enough. 注意：此部分试题请在答题卡2作答。

2014年6月六级翻译真题答案及解析

卷一：真题：中文热词通常反映社会变化和文化，有些在外国媒体上愈来愈流行。例如，土豪和大妈都是老词，但已获取了新的意义。土豪以前指欺压佃户和仆人的乡村地主，现在用于指花钱如流水或喜欢炫耀财富的人，也就是说，土豪有钱，但是没有品位。大妈是对中年妇女的称呼，但是现在特指不久前金价大跌时大量购买黄金的中国妇女。土豪和大妈可能会被收入新版的牛津(OXford)英语词典，至今约有120中文加进了牛津英语词典，成了英语语言的一部分。参考答案： The Chinese heated words usually reflect social changes and culture, some o f which are increasingly popular with foreign media. Tuhao and dama, forexa mple, are both old words, but they get differentmeanings now. The word tuhao used to mean rural landlords who oppress their tenants and servants, while now it refers to people spending money withoutlimits or those showing off all around. That is to say, tuhao owns money rather than taste. T heword dama is used to describe middle-aged women. However, it is regarde d as a special wordto call those Chinese women who rushed to purchase gol d when th e gold price decreasedsharply not long ago. Tuhao and dama may be included in the new Oxford dictionary. Up to now, ab out 120 Chinesewords have been added to it, becoming a part of English lang uage. 卷二：最近中国科学院(Chinese Academy of Science )出版了关于其最新科学发现与未来一年展望的年度系列报告。系列报告包括三部分：科学发展报告，高技术发展报告，中国可持续战略报告。第一份报告包含中国科学家的最新发现，诸如新粒子研究与H7N9病毒研究的突破。该报告还突出强调了未来几年需要关注的问题。第二份报告公布了一些应用科学研究的热门领域，如3D打印和人造器官研究。第三份报告呼吁加强顶层设计，以消除工业升级中的结构性障碍，并促进节能减排。 Chinese Academy of Science recently published an annual report about its latest scientific findings and the prospect of the next year. The report consists of three parts: science development, more advanced technology development and the sustainable strategy of China. The first one includes the latest findings of Chinese scientists, such as the research of new particle and the breakthrough in the study of H7N9 virus. Furthermore, it highlights some problems we need to focus in next few years. The second one announces some heated fields in applied science. For example, the 3-dimension print and the study of human organs. The third one suggests people enhance the top design in order to get rid of the structural obstacles in industrial upgrading and to promote the energy-saving and emission-reduction. 卷三：北京计划未来三年投资7600亿元治理污染，从减少pm2.5排放入手。这一新公布的计划

2014年12月大学英语六级考试真题及答案(第三套)

2014年12月大学英语六级考试真题三 Writing (30 minutes) For this part, you are allowed 30 minutes to write an essay based on the picture below. You should start your essay with a brief description of the picture and then discuss whether technology is indispensable in education. You should give sound arguments to support your views and write at least 150 words but no more than 200 words. Listening Comprehension (30 minutes) Section A 1 A) In a parking lot. B) At a grocery. C) At a fast food restaurant. D) In a car showroom. 2. A) Change her position now and then. B) Stretch her legs before standing up. C) Have a little nap after lunch. D) Get up and take a short walk. 3. A) The students should practice long-distance running. B) The students’ physical condition is not desirable. C) He doesn’t quite believe what the woman says. D) He thinks the race is too hard for the students. 4. A) They will get their degrees in two years. B They are both pursuing graduate studies. C) They cannot afford to get married right now. D) They do not want to have a baby at present. 5. A) He must have been mistaken for Jack. B) Twins usually have a lot in common. C) Jack is certainly not as healthy as he is. D) He has not seen Jack for quite a few days. 6. A) The woman will attend the opening of the museum. B) The woman is asking the way at the crossroads. C) The man knows where the museum is located. D) The man will take the woman to the museum. 7. A) They cannot ask the guy to leave. B) The guy has been coming in for years. C) The guy must be feeling extremely lonely. D) They should not look down upon the guy.

周日进 2014年6月SAT回忆

南京爱唯易周日进SAT托福培训 2014年6月SAT考试填空题周老师独家回忆 @Hongkong 观塘给大家回忆一下填空，排名不分先后： 1. 两个的争论非常heated，但是非常courteous，答案为intense 和civil 2. 动物征服寒冷用各式各样的方法，但是人类用一种方法就超越他们surpass 3. 被告编造的故事反而是hinder了自己的defense，让律师也不相信他了。 4. 紧张会刺激疾病的产生，但是微量的紧张会加强自己，fortify 5. 一个发现了动物一起生活的什么东东，共生：symbiosis 6. 一个人说自己在商业上的牛逼是未被证实的，很多人遵循他的意见都破产了。acumen。。。unwarranted 7. 不能抹去的，难以忘却的回忆。indelible 8. 一个牛逼的人混合了当代和什么什么风格音乐，amalgamate 9.叔叔的拜访很surprising，但是他还是热心欢迎，delighted 10.大家都是对成功的科学吹牛逼，一个人表达了tempered的看法，认为failure对于之后的成功也很重要 11. 大家对于一本书是hail，认为是非常杰出的 12. 一个人不是很lenient，仁慈，对任何transgression都严厉处罚 13. 双方的division非常大，达到了schism的程度。 14. 一个人虽然有点taciturn，但是却非常tenacious，因为不说目标，但是会坚定追求 15. 一个什么program让大家engage，这样就revitalize很多人了。 16. 纸质书不是dead，但也是moribund，慢慢死亡 17. 一个人表现出condescend，但是大家对于他的air of superiority不予理睬 18. epiphany，原文说的是突然意识到什么。

2014年6月至2015年6月英语六级完形填空真题及答案【9套卷全】

For investors who desire low riskand guaranteed income,U.S. Government bonds are a secure investment becausethese bonds have the financial backing and full faith and credit of the federalgovernment.Municipal bonds,also secure,are offered by local governmengts andoften have____36______such as tax-free interest.Some may even be____37______.Corportate bonds are a bit more risky. Two questionsoften_____38_____first-time corportate bond investors.The first is”If I purchase a corportate bond,do I have t o hold it until thematueity date?”The answer is no.Bonds are bought and sold daily on____39_____securities exchanges.However,if your bond does not have____40_____that make it attractive to other investors, you may be forced to sell your bondat a____41____i.e., a price less than the bond’s face value. But if your bond is highly valued by otherinvestors, you may be able to sell it at a premium, i.e., a price above itsface value. Bond prices gcncrally____42____ inversely (相反地)with current market interest rates. Asinterest rates go up, bond pnccs tall, and vice versa (反之亦然).Thus, like all investments，bonds have adegree of risk. The second question is “How can I ___43_______ the investment risk of a particular bondissue?” Standard & Poor’s and Moody’s Investors S ervice rate the level of risk of many corporateand government bonds. And ____44______, the higher the market risk of a bond，the higher the interest rate. Investors willinvest in a bond considered risky only if the _____45_____return is highenough. A)advantages I)fluctuate B)assess J)indefinite C)bother K)insured D)conserved L)major E)deduction M)naturally F)discount N)potential G)embarrass 0)simultaneously H)features 36.A advantages 37.K insured 38. C bother 39. L major 40. H features 41. F discount 42. I fluctuate 43. B assess 44. M naturally 45. N potential 2014.6【2】 Fear can be an effective way to change behavior. One study compared the effects of high-tear and low-fear appeals on changes in attitudes and behaviors related to dental hygiene （卫生）. One group of subjects was shown awful pictures of ___36___teeth and diseased gums; another group was shown less frightening materials such as plastic teeth, charts, and graphs. Subjects who saw the frightening materials reported more anxiety and a greater___37___to change the way they took care of their teeth than the low-fear group did. But were these reactions actually___38___into better dental hygiene practices? To answer this important question, subjects were called back to the laboratory on two___39___ (five days and six weeks alter the experiment). They chewed disclosing wafers（牙疾诊断片）that give a red stain to any uncleaned areas of the teeth and thus provided a direct___40___of how well they were really taking care of their teeth. The result showed that the high-fear appeal did actually result in greater and more___41___changes in dental hygiene. That is, the subjects___42___to high-fear warnings brushed their teeth more___43____than did those who saw low-fear warnings. However, to be an effective persuasive device it is very important that the message not be too frightening and that people be given___44___guidelines to help them to reduce the cause of the fear. If this isn’t done, they may reduce their anxiety by denying the message or the___45___of the communicator. If that happens, it is unlikely that either attitude or behavior change will occur. A) accustomed B) carefully C) cautiously D) concrete E) credibility F) decayed G) desire H) dimensions I) eligible J) exposed K) indication L) occasions M) permanent N) sensitivity O) translated 36.F 37.G 38.O 39.L 40.K 41.D 42.J 43.B 44.I 45.E

2018年6月SAT数学每日练习题：几何应用题

2018年6月SAT数学每日练习题：几何应用题今天三立在线教育SAT网为大家带来的是2018年6月SAT数学每日练习题之几何应用题的相关资讯，备考的烤鸭们，赶紧来看看吧！ Vera is planning to use exactly 112 feet(ft) of fencing as the border of a rectangular garden. If the width of the garden is 1/3 of the length of the garden, what is the width of the garden? A.7ft B.14ft C.28ft D.42ft 答案：B 解析：Choice B is correct. 宽是长的三分之一，长就是宽的3倍，则栅栏的宽 =112/(2X4)=14ft 2018SAT数学考点清单列一次等式、不等式，解方程。需要注意的是二元一次方程的解的情况，线性规划问题，含绝对值的不等式等; 比率、比例、百分数、单位换算、利率问题;数据分析可以分为四大板块看，即各种图表的数据描述、抽样和实验等获取数据的方法、概率计算、数据估计等; 多项式及其分解因式、二次方程、二次函数、分式计算、无理式计算，函数图形及相关性质，复合函数;

角三角形中三角函数的定义，圆的解析式，弧长和扇形面积的计算，复数定义及运算。 2018年6月SAT数学每日练习题：几何应用题 Vera is planning to use exactly 112 feet(ft) of fencing as the border of a rectangular garden. If the width of the garden is 1/3 of the length of the garden, what is the width of the garden? A.7ft B.14ft C.28ft D.42ft 答案：B 解析：Choice B is correct. 宽是长的三分之一，长就是宽的3倍，则栅栏的宽 =112/(2X4)=14ft 2018SAT数学考点清单列一次等式、不等式，解方程。需要注意的是二元一次方程的解的情况，线性规划问题，含绝对值的不等式等; 比率、比例、百分数、单位换算、利率问题;数据分析可以分为四大板块看，即各种图表的数据描述、抽样和实验等获取数据的方法、概率计算、数据估计等; 多项式及其分解因式、二次方程、二次函数、分式计算、无理式计算，函数图形及相关性质，复合函数;

2014年6月英语六级真题及答案解析-第二套

2014年6月大学英语六级考试真题(二) Part I Writing (30 minutes) 题目一： Directions: For this part, you are allowed 30 minutes to write an essay explaining why it is unwise to put all eggs in one basket．You can give examples to illustrate your point．You should write at least 150 words and no more than 200words．题目二： Directions: For this part, you are allowed 30 minutes to write an essay explaining why it is unwise to jump to conclusions upon seeing or hearing something．You can give examples to illustrate your point． You should write at least 150 words but no more than 200 words．注意：此部分试题请在答题卡1上作答。 Part ⅡListening Comprehension (30 minutes) Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations．At the end of each conversation, one or more questions will be asked about what was said．Both the conversation and the questions will be spoken only once．After each question there will be a pause．During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer ．Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre．注意：此部分试题请在答题卡1上作答。 1．A．They might be fake products． B．They might be stolen goods． C．They might be faulty products． D．They might be smuggled goods． 2．A．They are news reporters． B．They are job applicants． C．They are civil servants． D．They are public speakers． 3．A．The man went to change the time of his computer class． B．A computer degree is a must for administrative work． C．The woman wants to get a degree in administration． D．The man has decided to quit his computer class． 4．A．It was sponsored by a car manufacturer． B．It was not as exciting as he had expected． C．The fifth contestant won the biggest prize． D．A lot of contestants participated in the show． 5．A．Reading a newspaper column． B．Waiting for someone at the airport． C．Driving from New York to Boston． D．Looking at a railway timetable．

2017年6月大学英语六级真题第三套-完整版

Part I Writing (30 minutes) Directions: Suppose you are asked to give advice on whether to attend college at home or abroad, write an essay to state your opinion. You are required to write at least 150 words but no more than 200 words. 【参考范文】 Whether to Attend College at Home or Abroad? Currently, with studying abroad gains mounting popularity among people, there is a heated debate about whether to attend college at home or abroad. Opinions on this topic vary from person to person. Some see more benefits in studying at home while others claim that studying abroad is a more ideal choice as it’s more challenging. Personally, I am a strong favorer of the latter view. Listed below are the reasons for my advice. First of all, attending college abroad provides an opportunity to broaden one’s experience and mind. You can acquire cross-cultural experiences and gain new perspectives on your chosen field of study. In addition, studying abroad helps you to polish your social skills; you can make friends with different people with different background. Thirdly, overseas studying is conducive to the formation of an independent, autonomous and tenacious personality, which will ultimately benefit the achievement of our life goals. Just as an old saying goes: “It is better to travel thousand miles than to read ten thousand books.” Then studying abroad can not only enable us to reap in our books, but also in our trips. And this is why attending college abroad is a preferable selection for me. Part II Listening Comprehension 说明：2017年6月大学英语六级真题全国共考了两套听力。本套（即第三套）的听力材料与第一套完全一样，只是选项的顺序不同而已，故本套不再重复给出。 Part III Reading Comprehension (40 minutes) Section A Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.

2015年6月SAT真题(北美)section 7

1.The entertainer was know for his------: he gave essentially the same solid performance night after night for twenty years. (A)Bluntness (B)Arrogance (C)Obedience (D)Generosity (E)Consistency 2.Transoceanic navigation is so------coastal navigation that the development of the former from the latter required------new instruments rather than modifying older ones. (A)contingent on .. perfecting (B)different from .. inventing (C)divorced from .. rejecting (D)separate from .. repairing (E)inferior to .. exploiting 3.It is widely------,almost to the point of being conventional wisdom, that movies have experienced and overall------in quality; exceptions are generally regarded as happy accidents. (A)assumed .. decline (B)denied .. drop (C)known .. improvement (D)overlooked .. lapse (E)hoped .. rise 4.Once regarded as an accurate, or------, representation of reality, the well-known painting is now consideration to be an entirely------creation. (A)faithful .. imaginative (B)distorted .. confusing (C)outdated .. fictional (D)precise .. practical (E)artificial .. sufficient 5.Many teachers------jargon: they avoid specialize terminology, explaining difficult concepts in term that students understand. (A)manifest (B)divulge (C)propagate (D)invoke (E)eschew Questions 6-9 are based on the following passage. Passage 1