Đề thi học sinh giỏi lớp cấp tỉnh năm 2010 - 2011

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Mời các bạn hãy tham khảo đề thi học sinh giỏi lớp 12 cấp tỉnh năm 2010 - 2011 gồm 2 môn: Hóa, Anh...giúp các em có thêm tư liệu để luyện tập chuẩn bị kì thi tới tốt hơn. Chúc các em thi tốt đạt điểm cao.

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SỞ GIÁO DỤC VÀ ĐÀO TẠO KỲ THI CHỌN HỌC SINH GIỎI CẤP TỈNH BẮC GIANG LỚP 12 - THPT NĂM HỌC 200 - 2011 MÔN THI : HOÁ HỌC ĐỀ THI CHÍNH THỨC Thời gian làm bài: 180 phút Ngày thi: 05/04/2011 Câu 1: (2,0 điểm) Một hợp chất tạo thành từ M+ và X 2 . Trong phân tử M2X2 có tổng số các hạt proton, nơtron, 2 electron bằng 164, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 52. Số khối của nguyên tử M lớn hơn số khối của nguyên tử X là 23. Tổng số hạt trong M+ lớn hơn trong X 2 là 7. Xác định công thức M2X2. 2 Câu 2: (2,0 điểm) Cho 50 gam dung dịch muối MX (M là kim loại kiềm, X là halogen) 35,6% tác dụng với 10 gam dung dịch AgNO3 thu được một kết tủa. Lọc bỏ kết tủa thu được dung dịch nước lọc. Biết nồng độ MX trong 5 dung dịch nước lọc bằng lần nồng độ MX trong dung dịch ban đầu. Xác định công thức muối MX. 6 Câu 3: (2,0 điểm) Cho dung dịch CH3COOH 0,1M (Ka = 1,75 . 10-5) 1. Tính pH, độ điện li α và nồng độ các ion trong dung dịch. 2. Tính pH của dung dịch hỗn hợp CH3COOH 0,1M và CH3COONa 0,1M. Câu 4: (2,0 điểm) Người ta mạ niken lên mặt vật kim loại bằng phương pháp mạ điện trong bể mạ chứa dung dịch NiSO4 (điện cực trơ), với cường độ dòng điện I = 9A. Cần mạ một mẫu vật kim loại hình trụ có bán kính 2,5cm, chiều cao 20cm sao cho phủ đều một lớp niken dày 0,4 mm trên bề mặt. Hãy: a. Viết quá trình các phản ứng xảy ra trên các điện cực của bể mạ điện. b. Tính thời gian của quá trình mạ điện trên. Cho khối lượng riêng của Ni là 8,9 g/cm3. Câu 5: (2,0 điểm) 1. Hoà tan 5,4 gam hỗn hợp K2Cr2O7 và Na2Cr2O7 vào nước thành một lít dung dịch A. Cho 50 ml dung dịch FeSO4 0,102M vào 25 ml dung dịch A. Để xác định lượng FeSO4 dư cần dùng 16,8 ml dung dịch KMnO4 0,025M. Biết các quá trình trên đều xảy ra trong môi trường H2SO4. Viết phương trình hoá học xảy ra và tính khối lượng mỗi muối đicromat nói trên. 2. Cho các dung dịch riêng biệt mất nhãn sau: Na2SO4, AlCl3, FeSO4, NaHSO4, FeCl3. Chỉ dùng dung dịch K2S để nhận biết các dung dịch trên ngay ở lần thử đầu tiên. Viết các phương trình hoá học minh hoạ. Câu 6: (2,0 điểm) Dung dịch A gồm 0,4 mol HCl và 0,05 mol Cu(NO3)2. Cho m gam bột Fe vào dung dịch khuấy đều cho đến khi phản ứng kết thúc thu được chất rắn X gồm hai kim loại, có khối lượng 0,8m gam. Tính m. Giả thiết sản phẩm khử HNO3 duy nhất chỉ có NO. Câu 7: (2,0 điểm) 1. Một hiđrocacbon X có chứa 88,235% cacbon về khối lượng. Xác định công thức phân tử và công thức cấu tạo của X, biết X là hiđrocacbon no có ba vòng, mỗi vòng đều có 6 nguyên tử cacbon. 2. Cho 5 kg glucozơ (chứa 20% tạp chất) lên men. Hãy tính thể tích của ancol etylic 400 thu được, biết rằng khối lượng ancol bị hao hụt 10% và khối lượng riêng của ancol etylic nguyên chất là 0,8 g/ml. Câu 8: (2,0 điểm) Hợp chất A là một α-amino axit. Cho 0,01 mol A tác dụng vừa đủ với 80 ml dung dịch HCl 0,125M, sau đó cô cạn cẩn thận thu được 1,835 gam muối. Mặt khác, khi trung hoà 2,94 gam A bằng dung dịch NaOH vừa đủ thì được 3,82 gam muối. Hãy: a. Xác định công thức cấu tạo và gọi tên A, biết A có cấu tạo mạch không phân nhánh. b. Viết phương trình phản ứng của A với dung dịch NaNO2 với sự có mặt của axit clohiđric. Câu 9: (2,0 điểm) Chia 7,1 gam hỗn hợp X gồm hai andehit đơn chức thành hai phần bằng nhau: - Phần 1 đốt cháy hoàn toàn thu được 7,7 gam CO2 và 2,25 gam H2O. - Phần 2 cho tác dụng với lượng dư dung dịch AgNO3 trong NH3 thu được 21,6 gam bạc. a. Xác định công thức phân tử, viết công thức cấu tạo và gọi tên hai andehit trên? b. Bằng phương pháp hoá học hãy phân biệt mỗi andehit trên? Câu 10: (2,0 điểm) Cho m gam xenlulozơ tác dụng vừa đủ với 25,2 gam HNO3 có trong hỗn hợp HNO3 đặc và H2SO4 đặc, tạo thành 66,6 gam hỗn hợp X gồm xenlulozơ mononitrat và xenlulozơ đinitrat. Tính m và % khối lượng các chất trong hỗn hợp X. ---------- Hết ---------- (Cán bộ coi thi không giải thích gì thêm, học sinh được sử dụng bảng hệ thống tuần hoàn) Họ và tên thí sinh:....................................................................Số báo danh:...................................................
SỞ GD&ĐT NGHỆ AN KỲ THI CHỌN HỌC SINH GIỎI CẤP TỈNH LỚP 12 NĂM HỌC 2010 – 2011 Đề chính thức Môn thi: TIẾNG ANH LỚP 12 THPT - BẢNG C Thời gian làm bài: 180 phút (Đề thi gồm 05 trang) ĐIỂM HỌ TÊN, CHỮ KÍ GIÁM KHẢO SỐ PHÁCH Bằng số:………………………………….. Giám khảo 1: ……………………………………… Bằng chữ:………………..………………. Giám khảo 2: ……………………………………… SECTION A – PHONETICS I. Choose thewordwhoseunderlinedpartispronounceddifferentlyfromthatoftheothers. 1. A. achieve B. choice C. chief D. brochure 2. A. depends B. years C. temples D. parents 3. A. naked B. sacred C. raised D. hatred 4. A. nature B. future C. picture D. mature 5. A. guilty B. busy C. bury D. build 1. 2. 3. 4. 5. II. Identify theword whosestressedpatternisdifferentfromthatof the others. 6. A. innovation B. disappear C. understand D. identify 7. A. accompany B. category C. interviewer D. fascinating 8. A. curricumlum B. enthusiast C. subordinate D. democratic 9. A. university B. veterinary C. undergraduate D. geographical 10. A. popular B. dangerous C. magazine D. applicant 6. 7. 8. 9. 10. Section B – vocabulary and grammar I. Choose thebest answerfromA,B, CorD. 11. Eighty kilometers is the fifty miles. A. equivalent of B. equivalent from C. equal of D. equal to 12. We are prepared to overlook the error on this occasion your previous good work. A. thanks to B. with a view to C. in the light of D. with regard to 13. He is not under arrest, nor have the police placed any on his movements. A. restriction B. obstacle C. veto D. regulation 14. I'd rather you anyone what I said. A. don't tell B. won't tell C. didn't tell D. not to tell 15. He completely with what I said. A. agreed B. complained C. argued D. accepted 16. of the workers has his own work. A. All B. Each C. Every D. Other 17. There’s a beautiful of the old city from the terrace of their mountain house. A. view B. aspect C. vision D. appearance 18. Peter was really at the prospect of starting work. A. exciting B. excited C. interesting D. interested
19. As soon as you buy a car, it starts falling in . A. cost B. worth C. value D. price 20. It is vital that we a change in people's attitudes. A. bring down B. bring back C. bring about D. look after 21. You can drive my car you drive carefully. A. unless B. as long as C. because D. although 22. it were well paid, I would accept this proposal. A. Providing B. Unless C. But for D. If only 23. The police carried out a search for the missing diplomat. A. thorough B. through C. throughout D. thoughtful 24. Is he enough to take on so much responsibility? A. elderly B. ancient C. ripe D. mature 25. But for your help, we in trouble. A. would have been B. would be C. had been D. were 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. II. Thereisone mistake ineachof thefollowing sentences. Findand correct it. 26. It was suggested that Pedro studies the material more thoroughly before attempting to pass the exam. 27. Tom has not completed the assignment yet and Maria hasn’t, neither. 28. The United States receives a large amounts of revenue from taxation of tobacco products. 29. Not only cigarettes and alcohol is believed to be harmful to one’s health. 30. She has changed a lot of jobs since she has graduated from university five years ago. 31. John could have gotten that job if he had applied it. 32. Because they had spent too many time considering the new contract, the students lost the opportunity to leave the appartment.. 33. Whistling or clapping our hands to get the person’s attention are considered impolite. 34. Despite the time of the year, yesterday’s temperature was enough hot to turn on the air conditioning. th 35. Found in the 12 century, Oxford university ranks among the world’s oldest universities. Mistake Correction Mistake Correction 26. 31. 27. 32. 28. 33. 29. 34. 30. 35. Section C – reading I. Read thefollowingpassage, andthen choose thebestanswerfromA, B,CorD. Accreditation is a system for setting national standards of quality in education. The United States is unique in the world because its accreditation is not administered by the government, but rather by committees of educators and private agencies like the Middle State Association of Colleges and Secondary School and the Society of Engineers. Before registering to study in any education institution in the United States, a student should make certain that the institution is accredited in order to assure that the school has a recognized standard of organization, instruction, and financial support. Foreign students should be particularly
careful to check an institution’s accreditation because other government or future employers may not recognize a degree earned from a school that has not received accreditation. If a college is accredited, catalogs and brochures will usually indicate the accreditation status. If you are not sure about a certain school, don’t hesitate to check its reputation with an education officer at the nearest US embassy. 36. The title best expresses the ideas in this passage is . A. studying in the United States B. accreditation C. how to find best school D. the middle States Association of colleges and Secondary Schools 37. What should students do in order to check the accreditation of a school that may interest them ? A. Write to the school B. Write to the US Ministry of Education C. Register to study at the school D. Consult a US embassy official 38. According to the author, all of the following statements are true of the accreditation system in the United States EXCEPT . A. The accreditation on status of a school will be listed in its catalogs and brochures. B. Future employers will be influenced by the accreditation of a candidate’s school. C. The accreditation system is like that of many other countries.. D. Accreditation provides information about the standards of instruction and organization of a school. 39. The word “unique” in the first paragraph means . A. unusual. B. first. C. standard. D. large. 40. From this passage, it may be concluded at an accredited school . A. does not offer a degree. B. may close because of financial disorganization. C. is administered by the government. D. is better than an accredited school. 36. 37. 38. 39. 40. II. Choose the bestanswerfromA, B,CorD to fillinthegapsinthe followingpassage. The (41) of book knowledge is one part of school education but this kind of learning can be and often is carried to (42) in many countries so that no time for other interests is (43) to young people. Not only must they attend school (44) five-hour periods on six days of the week, studying possibly as many as thirteen different subjects, but in addition they may even go to afternoon institutes for (45) instruction. They have almost no chance of taking (46) any of their own hobbies or becoming familiar with the plants and (47) life of the countryside except during their summer holidays. Early youth should be a time of exploration and adventure, of reading books for (48) as well as study, of freedom to enjoy life before the responsibilities of working for a living and (49) a family (50) an end to study, to freedom and only too often to carefree enjoyment. 41. A. gathering B. collection C. obtaining D. accumulation 42. A. extremity B. excess C. limits D. boundary 43. A. available B. provided C. devoted D. reserved 44. A. during B. for C. throughout D. in 45. A. farther B. additional C. extra D. further 46. A. on B. up C. back D. over 47. A. untamed B. original C. wild D. natural 48. A. pleasure B. amusement C. joy D. entertainment 49. A. creating B. bringing C. building D. raising 50. A. hold B. put C. indicate D. mark
41. 42. 43. 44. 45. 46. 47. 48. 49. 50. III.Fill in eachnumbered gapwithonesuitable word. A healthful lifestyle leads to a longer, happier, healthier life. Staying healthy means eating a well-balanced diet, getting regular exercise, and avoiding things that are bad for the (51) and mind. Nutrition plays a key role (52) maintaining good health and preventing many diseases. In spite of all the information available about diet, scientists still believe that good nutrition can (53) simple. There are several basic rules to follow. Keep fat intake low. Eat lots of foods high in carbon hydrates, (54) are the starches in grains, legumes (beans and peas), vegetables and some fruits. (55) too much sugar. Limit salt. Eat lots of fruits and vegetables, which are high in (56) A healthy lifestyle is an active lifestyle. (57) of proper physical exercise can cause tiredness, irritability, and poor general health. Physical fitness requires both aerobic exercise, such as running, bicycle riding, and swimming, (58) muscle-strengthening exercise, such as weight-lifting. Finally, good health is acquired by (59) no to bad habits such as smoking, drinking, and overeating and by avoiding situations that are constantly stressful. People can take their lives and happiness into their own (60) . Maintaining a healthy lifestyle is the first step. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. Section D – writing I. Completethe secondsentence so that it hasthesame meaningasthefirstone. 61. I only recognized him when he came into the light. → Not until ........................................................................................................................................................................ 62. I didn’t study French at school and now I regret it. → I wish ............................................................................................................................................................................. 63. Timmy has become confident as a result of his success. → Timmy’s success has turned............................................ ........................................................................................ 64. You can call me up at anytime you make up your mind. → Whenever …………………………………………………………………................................................................ 65. It is believed that the man escaped in a stolen car. → The man……………………………………………………………………………………………………………….. II. Use the word givenin bracketsand make any necessary additionsto writea new sentence in sucha way thatitisassimilaraspossiblein meaningtotheoriginalsentence. DoNOTchange theformofthegivenword(s). 66. The cost of excursions is part of the price of the holiday. (includes) → ……………………………………………………………………………………………………………………… 67. Paula said I had caused the accident. (blamed) → ……………………………………………………………………………………………………………………… 68. The stereo was so powerful that I usually went deaf. (such) → ………………………………………………………………………………………………………………………
69. The last Olympic Games were held in Seoul. ( took) → ……………………………………………………………………………………………………………………… 70. “I wouldn’t trust Frank with your money if I were you, Carl” I said. (advised) → ……………………………………………………………………………………………………………………… III. Write a composition about 150 – 200 words on the following topic: “Participating in English Speaking Clubs helps to promote students’ speaking skill and interest in learning English”. Do you agree or disagree with that statement? …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………..……………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… - - - THE END - - -
SỞ GD& ĐT NGHỆ AN KỲ THI CHỌN HỌC SINH GIỎI CẤP TỈNH LỚP 12 NĂM HỌC 2010 - 2011 HƯỚNG DẪN CHẤM ĐỀ THI CHÍNH THỨC Môn thi: TIẾNG ANH LỚP 12 THPT – BẢNG B (Hướng dẫn chấm gồm 02 trang) SECTION A – PHONETICS I. Choose thewordwhoseunderlinedpartispronounceddifferentlyfromthatoftheothers. (1p for 1 correct answer X 5 = 5 points) 1. D 2. D 3. C 4. D 5. C II. Identify theword whosestressedpatternisdifferentfromthatof the others. (1p for 1 correct answer X 5 = 5 points) 6. D 7. A 8. D 9. B 10. C SECTION B – VOCABULARY AND GRAMMAR I. Choose thebestanswerfromA,B, C orD. (1p for 1 correct answer X 15 = 15 points) 11. A 12. C 13. A 14. C 15. A 16. B 17. A 18. B 19. C 20. C 21. B 22. A 23. A 24. D 25. A II. Thereisone mistake ineachof thefollowing sentences. Findand correct it. (1p for 1 correct answer X 10 = 10 points) Mistake Correction Mistake Correction 26 studies (should) study 31 had applied had applied for 27 neither either 32 many much 28 amounts amount 33 are is 29 and but also 34 enough hot hot enough 30 has graduated graduated 35 found founded SECTION C - READING I. Read the followingpassage, andthen choose thebestanswerfromA, B,CorD. (2p for 1 correct answer X 5 = 10 points) 36. B 37. D 38. C 39. A 40. B II. Choose the bestanswerfromA, B,CorD to fillinthegapsinthe followingpassage. (1p for 1 correct answer X 10 = 10 points) 41. D 42. B 43. A 44. C 45. D 46. B 47. C 48. A 49. D 50. B
III.Fill in eachnumbered gapwithonesuitable word. (1p for 1 correct answer X 10 = 10 points) 51. body 52. in 53. be 54. which 55. avoid 56. vitamins 57. lack 58. and 59. saying 60. hands SECTION D - WRITING I. Completethe secondsentence sothat it hasthesame meaningasthefirstone. (2p for 1 correct answer X 5 = 10 points) 61. Not until he came into the light did I recognize him. 62. I wish I had studied French at school. 63. Timmy’s success has turned him into a confident person. 64. Whenever you make up your mind, you can call me up. 65. The man is believed to have escaped in a stolen car. II. Use the word givenin bracketsand make any necessary additionsto writea new sentence in sucha way thatitisassimilaraspossiblein meaningtotheoriginalsentence. DoNOTchange theformofthegivenword(s). (2p for 1 correct answer X 5 = 10 points) 66. The price of the holiday includes the cost of excursions. 67. Paula blamed me for causing/ having caused the accident. 68. It was such a powerful stereo that I usually went deaf. 69. The last Olympic Games took place in Seoul. 70. I advised Carl not to trust Frank with his money III. Writea composition about150-200wordson thefollowingtopic: (15 points) “Participating in English Speaking Clubs helps to promote students’ speaking skill and interest in learning English”. Do you agree or disagree with that statement? Notes: The mark given to this part is based on the following scheme: 1. Content: (40% of total mark) a provision of all main ideas and as details as appropriate. 2. Organization & Presentation: (30% of total mark) ideas are organized and presented with coherence, style, and clarity appropriate to the level of English language gifted upper- secondary school students. 3. Language: (30% of total mark) a variety of vocabulary and structures appropriate to the level of English language gifted upper-secondary school students. Markers, please, should discuss the suggested answers and the marking scale thoroughly before marking the papers. Thank you for your cooperation and considerations. TOTAL: 100 / 5 = 20
SỞ GIÁO DỤC VÀ ĐÀO TẠO KỲ THI CHỌN HỌC SINH GIỎI CẤP TỈNH LỚP 12 THPT TỈNH YÊN BÁI Năm học 2010 - 2011 Đề chính thức Môn: Tiếng Anh (đề gồm 7 trang) Thời gian: 180 phút (không kể thời gian giao đề) Ngày thi: 10/10/2011 Số phách Điểm của bài thi Họ, tên và chữ kí của giám khảo (do chủ tịch HĐCT ghi) Bằng số: Giám khảo 1: Bằng chữ: Giám khảo 2: PART I: LISTENING (3 points)  There is a piece of music at the beginning and at the end of the listening part.  You have 30 seconds to read each question before listening.  Each recording is played twice with an interval of 10 seconds. Question I: Listen to 5 telephone massages and complete Carlos's diary. (2 points) Number Appointment Date Time 1 See the dentist 1. …………………… 2. …………………… 2 Dinner with Pamela 3. …………………… 4. …………………… 3 Pick up car 5. …………………… 6. …………………… 4 Tennis with Roberta 7. …………………… 8. …………………… 5 Nicky's birthday 9. …………………… 10. …..……………… Question II: Listen to the story and choose the best answer. (1 point) 1. The speaker went to London not to buy ________. A. Christmas presents B. books C. Christmas cards 2. The speaker wanted to catch the early afternoon train not because ________. A. it was the only train back B. he didn't like the noise of London C. he had made some arrangements for that evening 3. The train he wanted to catch was the ________ train. A. 3.13 B. 3.30 C. 3.33 4. While waiting for the train, he didn't buy ________. A. a newspaper B. a bar of chocolate C. a packet of chocolate biscuits 5. The packet of biscuits actually belonged to ________. A. the man B. the speaker C. someone else Your answer: 1. 2. 3. 4. 5. Page 1 of 7
PART II: PHONETICS (1 point) Question I: Pick out the word with the underlined part pronounced differently from the rest. 1. A. coach B. chore C. chorus D. check 2. A. shared B. helped C. asked D. laughed 3. A. rough B. tough C. cough D. enough 4. A. idea B. wise C. bride D. determine 5. A. cliffs B. friends C. claps D. compliments Your answer: 1. 2. 3. 4. 5. Question II: Pick out the word that has different stress pattern from the rest. 1. A. village B. begin C. pity D. column 2. A. suspicious B. marvelous C. physical D. argument 3. A. computer B. dependence C. discovery D. obviously 4. A. innovation B. identify C. understand D. disappear 5. A. generate B. confidence C. engineer D. energy Your answer: 1. 2. 3. 4. 5. PART III: LEXICO - GRAMMAR (5 points) Question I: Choose the word or phrase which best completes each sentence by choosing the letter A, B, C or D next to the correct word or phrase. (1 point) 1. Many Americans agree that wives and husbands should ________ all thoughts. A. talk B. share C. discuss D. argue 2. I ________ to accompany her to the theatre last night but she refused. A. promised B. suggest C. invite D. offer 3. Mary did not expect ________ to go to John's party. A. asking B. to ask C. being asked D. to be asked 4. There must be a perfect ________ between close friends. A. sympathy B. deceit C. absence D. pleasure 5. Most married couples in European countries ________ their wedding anniversaries every year. A. present B. conduct C. celebrate D. hold 6. This is ________ the most difficult job I have ever done. A. by far B. by all means C. by rights D. by the way 7. The English ________ more tea than Americans do. A. drinks B. drink C. drinking D. drank 8. I passed the test. I ________ it without your help. A. would pass B. wouldn't pass C. would have passed D. wouldn't have passed 9. Lynn waved to us as a ________ that she saw us. A. symbol B. sign C. signal D. signature 10. Stop wasting your time. It is time you ________ some real work. A. got off with B. got on for C. got down to D. got up to Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Question II: Supply the correct tense of the verbs in brackets. (1 point) This happened last year when one afternoon my husband and I (1. decide) ________ to repaint our out kitchen ceiling. It was about three o'clock and our two young children (2. play) ________ in their room quite happily. I had sent them there while we (3. decorate) ________ so that they (4.not/get) ________ in our way. We (5. paint) ________ for about twenty minutes when we Page 2 of 7
suddenly (6. realise) ________ that they (7. stop) ________ talking and laughing. The silence was worrying. I (8. rush) ________ upstairs and opened the door of their room. They (9. admire) ________ their wall which they had just finished painting blue, green and yellow. "We (10. paint) ________ too, Mum" they said. Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Question III: Fill in each blank with the correct form of the words. (1 point) Football is the most important sport in Italy (1. unite) ________ the country when the (2. nation) ________ team (Azzurri) plays the football season, running from September to June, culminates with the final Coppa Italia (3. compete) ________ , the equivalent of the English FA Cup. Italy's football, like an (4. obsess) ________, reaches a climax (5. one) ________ every four years when the World Cup is held. Other sports throughout the year also attract a large number of (6. follow) ________, so fans are never at a (7. lose) ________ for varied activities. For most big sporting events, tickets can be obtained at club outlets or at the venue. Agencies provide tickets but often at (8. inflate) ________ prices. People should beware of buying (9. enter) ________ tickets from touts at popular events as their expensive tickets may be (10. valid) ________ Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Question IV: There is one mistake in some of the following sentences. Underline the mistakes and correct them in the space provided. Put a tick () next to the correct sentences. (1 point) 1. When I arrived at the station, John has been waiting for me for an hour. …………………… 2. I think that you must have difficulty to find her house. …………………… 3. Having finished his assignment, he called his teacher. …………………… 4. The accident looked seriously at first but nobody was injured. …………………… 5. There are some laptops on the table. The black one is mine but others are not. …………………… 6. Not only Britain but also the United States have good universities. …………………… 7. The first things a new student must do include renting a flat, registering for …………………… classes and getting to know the city. 8. That cats have nine lives have been believed for centuries. …………………… 9. Almost lemons grown in the US come from Florida and California. …………………… 10. Concord can fly across the Atlantic without refueling and carrying 11 tons of …………………… freight Question V: Fill in each blank with an appropriate preposition. (1 point) Welcome to the class every body. I'm sure you are dying to show me exactly what you are capable (1) ________. I hope to see your faces at the pool a lot from now on. If you are serious (2) ________ swimming, you really need to be doing it (3) ________ regular basis, say two or three times a week in addition to these teaching sessions. (4) ________ the early stages, you'll be working on the basics - breathing, body position and so on. Today, we are going to work on putting the head under water (5) ________ a view to getting you all swimming correctly, with the head partly submerged. If you don't succeed (6) ________ the first attempt, don't worry. And please don't be afraid (7) ________ water - just try and relax. Eventually, we'll progress to the big pool, but (8) ________ the time being, we are going to be in the small pool where you can stand up and practise your techniques. The warm- up exercises we are going to start (9) ________ today are designed to get you out of breath, so keep your heads well clear of water. These exercises may well be different (10) ________ anything you are used to as we'll be doing some jumping and hopping in the water. Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Page 3 of 7
PART IV: READING (4 points) Question I: Read the following passage and use ONE word to fill in each gap. (1 point) In countries where parents are legally obliged to make (1) ________ their children receive a satisfactory education, school is compulsory for all children. Pupils usually attend (2) ________ school up to the age of 11 or 12. Then they move on to (3) ________ school, where they stay for the next five years or so. Most schools have (4) ________ at the end of the school year to test pupils' progress. If their marks are not good (5) ________, they may have to do extra work to catch up and in some countries, they (6) ________ the school year. Teachers write reports about their pupils and these can be discussed with parents. Most pupils attend (7) ________ schools, which are free. However, some parents send their children to private schools, where the (8) ________ may be quite high. If parents work abroad, they may send their children to a (9) ________ school, where pupils live for up to three months at a time. Pupils at these schools only go home at the (10) ________ of each term. Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Question II: Read the passage carefully and choose a suitable word to fill in each blank. (1 point) Getting good results in your studies come from (1) ________ good study habits. The best place to study is a comfortable room with good (2) ________. The best chair for studying should be one which you would be comfortable in, (3) ________ so comfortable that you may fall asleep in it after a while! Before you study, look for a (4) ________ environment without distractions. If you find your home too noisy for studying, try the library or community center (5) ________. When you study, set (6) ________ targets for yourself to (7) ________. For example, do not aim to study five chapters of Geography in one (8) ________ when you know that it will take more than an hour to finish one chapter. Furthermore, remember not to push yourself too (9) ________. When you have studied for a period of time, (10) ________ yourself by taking a short break. You could perhaps take a short walk or listen to some music for a while. 1. A. creating B. developing C. getting D. making 2. A. lighting B. light C. brightness D. shining 3. A. rather than B. without C. unless D. but not 4. A. silent B. still C. quiet D. mute 5. A. then B. or else C. just so D. instead 6. A. real B. realistic C. true D. life-like 7. A. achieve B. reach C. fulfill D. attain 8. A. stretch B. moment C. sitting D. serving 9. A. strongly B. hardly C. powerfully D. hard 10. A. award B. reward C. compliment D. congratulate Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Question III: Read the passage carefully and choose the best answers. (2 points) Millions of people are using mobile phones today. In many places, it is actually considered unusual not to use one. In many countries, mobile phones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected. The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health. On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of changes in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling businessman had to retire at young age because of serious memory loss. He could not remember even Page 4 of 7
simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, everyday of his working week, for a couple of years. His family doctor blamed his mobile phone use but his employer's doctor did not agree. What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about. As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone so often. 1. According to the passage, mobile phones are popular with young people because ________. A. they are indispensable in everyday communications B. they make them look more stylish C. they keep the users alert all the time D. they can not be replaced by regular phones 2. The changes possibly caused by mobile phones are mainly concerned with ________. A. the mobility of the mind and body B. the smallest units of the brain C. the arteries of the brain D. the resident memory 3. The word "means" in the passage is closest in meaning to ________. A. meanings B. expressions C. method D. transmission 4. The word "potentially" mostly means ________. A. obviously B. possibly C. certainly D. privately 5. "negative publicity" most likely means ________. A. information on the lethal effects of mobile phones B. widespread opinion about bad effects of mobile phones. C. the negative public use of mobile phones D. poor ideas about the effects of mobile phones 6. Doctors have tentatively concluded that mobile phones ________. A. cause some mental malfunction B. damage their user's emotions C. change their users' temper D. change their users' behaviors 7. The man mentioned in the passage, who used his mobile phone too often, ________ A. had a problem with his memory B. could no longer think lucidly C. abandoned his family D. suffered serious loss of mental ability 8. According to the passage, what makes mobile phones potentially harmful is ________ A. their radiant light B. their power of attraction C. their raiding power D. their invisible rays 9. According to the writer, people should ________. A. only use mobile phones in certain cases B. never use mobile phones in all cases C. keep off mobile phones regularly D. only use mobile phones in medical emergencies. 10. The most suitable title for the passage could be ________. A. Mobile phones; a must of our time B. Technological innovations and their prices C. The way mobile phones work D. The reasons why mobile phones are popular Your answer: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. PART V: WRITING (7 points) Question I: Rewrite these sentences so that the new one has a similar meaning as the given one. (1 point) 1. As I get older, I want to travel less. The older _____________________________________________________________ Page 5 of 7
2. He warned me not to use the mountain road. "I wouldn't ____________________________________________________________" 3. She discovered a new chemical element in her experiment. Her experiment resulted __________________________________________________ 4. I'd prefer you not to disturb me when I'm reading. I'd rather ______________________________________________________________ 5. Her son is so weak that she hardly leaves him alone. Such _________________________________________________________________ Question II: Rewrite each of the sentences using the given word so that the new one has a similar meaning as the one preceded. You must not change the given word. (1 point) 1. I haven't seen my granddad for over 5 years. (LAST) _____________________________________________________________________ 2. The power went out as soon as I turned on the computer. (NO) ______________________________________________________________________ 3. Both John and Jim don't wear helmets when going to school. (NOR) ______________________________________________________________________ 4. They worked together to clean up the mess after the storm. (HANDS) ______________________________________________________________________ 5. There's nothing new about the generation gap in every family. (HILLS) ______________________________________________________________________ Question III: Passage writing (2 points) Write a passage to describe some of your family rules in 150 words ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. Page 6 of 7
Question IV: Essay writing (3 points) Many students think that learning English is learning its grammar and structures. However, others argue that learning English is learning the skills (reading, listening, speaking, and writing) to use it in everyday life. Which idea do you agree with? Write an essay of about 250 words to express your opinion. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. THE END Page 7 of 7
SỞ GIÁO DỤC VÀ ĐÀO TẠO KỲ THI CHỌN HỌC SINH GIỎI CẤP TỈNH BẮC GIANG LỚP 12 - THPT NĂM HỌC 2010 - 2011 MÔN THI : HOÁ HỌC ĐỀ THI CHÍNH THỨC Thời gian làm bài: 180 phút Ngày thi: 05/04/2011 Câu 1: (2,0 điểm) Một hợp chất tạo thành từ M+ và X 2 . Trong phân tử M2X2 có tổng số các hạt proton, nơtron, 2 electron bằng 164, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 52. Số khối của nguyên tử M lớn hơn số khối của nguyên tử X là 23. Tổng số hạt trong M+ lớn hơn trong X 2 là 7. Xác định công thức M2X2. 2 Câu 2: (2,0 điểm) Cho 50 gam dung dịch muối MX (M là kim loại kiềm, X là halogen) 35,6% tác dụng với 10 gam dung dịch AgNO3 thu được một kết tủa. Lọc bỏ kết tủa thu được dung dịch nước lọc. Biết nồng độ MX trong 5 dung dịch nước lọc bằng lần nồng độ MX trong dung dịch ban đầu. Xác định công thức muối MX. 6 Câu 3: (2,0 điểm) Cho dung dịch CH3COOH 0,1M (Ka = 1,75 . 10-5) 1. Tính pH, độ điện li α và nồng độ các ion trong dung dịch. 2. Tính pH của dung dịch hỗn hợp CH3COOH 0,1M và CH3COONa 0,1M. Câu 4: (2,0 điểm) Người ta mạ niken lên mặt vật kim loại bằng phương pháp mạ điện trong bể mạ chứa dung dịch NiSO4 (điện cực trơ), với cường độ dòng điện I = 9A. Cần mạ một mẫu vật kim loại hình trụ có bán kính 2,5cm, chiều cao 20cm sao cho phủ đều một lớp niken dày 0,4 mm trên bề mặt. Hãy: a. Viết quá trình các phản ứng xảy ra trên các điện cực của bể mạ điện. b. Tính thời gian của quá trình mạ điện trên. Cho khối lượng riêng của Ni là 8,9 g/cm3. Câu 5: (2,0 điểm) 1. Hoà tan 5,4 gam hỗn hợp K2Cr2O7 và Na2Cr2O7 vào nước thành một lít dung dịch A. Cho 50 ml dung dịch FeSO4 0,102M vào 25 ml dung dịch A. Để xác định lượng FeSO4 dư cần dùng 16,8 ml dung dịch KMnO4 0,025M. Biết các quá trình trên đều xảy ra trong môi trường H2SO4. Viết phương trình hoá học xảy ra và tính khối lượng mỗi muối đicromat nói trên. 2. Cho các dung dịch riêng biệt mất nhãn sau: Na2SO4, AlCl3, FeSO4, NaHSO4, FeCl3. Chỉ dùng dung dịch K2S để nhận biết các dung dịch trên ngay ở lần thử đầu tiên. Viết các phương trình hoá học minh hoạ. Câu 6: (2,0 điểm) Dung dịch A gồm 0,4 mol HCl và 0,05 mol Cu(NO3)2. Cho m gam bột Fe vào dung dịch khuấy đều cho đến khi phản ứng kết thúc thu được chất rắn X gồm hai kim loại, có khối lượng 0,8m gam. Tính m. Giả thiết sản phẩm khử HNO3 duy nhất chỉ có NO. Câu 7: (2,0 điểm) 1. Một hiđrocacbon X có chứa 88,235% cacbon về khối lượng. Xác định công thức phân tử và công thức cấu tạo của X, biết X là hiđrocacbon no có ba vòng, mỗi vòng đều có 6 nguyên tử cacbon. 2. Cho 5 kg glucozơ (chứa 20% tạp chất) lên men. Hãy tính thể tích của ancol etylic 400 thu được, biết rằng khối lượng ancol bị hao hụt 10% và khối lượng riêng của ancol etylic nguyên chất là 0,8 g/ml. Câu 8: (2,0 điểm) Hợp chất A là một α-amino axit. Cho 0,01 mol A tác dụng vừa đủ với 80 ml dung dịch HCl 0,125M, sau đó cô cạn cẩn thận thu được 1,835 gam muối. Mặt khác, khi trung hoà 2,94 gam A bằng dung dịch NaOH vừa đủ thì được 3,82 gam muối. Hãy: a. Xác định công thức cấu tạo và gọi tên A, biết A có cấu tạo mạch không phân nhánh. b. Viết phương trình phản ứng của A với dung dịch NaNO2 với sự có mặt của axit clohiđric. Câu 9: (2,0 điểm) Chia 7,1 gam hỗn hợp X gồm hai andehit đơn chức thành hai phần bằng nhau: - Phần 1 đốt cháy hoàn toàn thu được 7,7 gam CO2 và 2,25 gam H2O. - Phần 2 cho tác dụng với lượng dư dung dịch AgNO3 trong NH3 thu được 21,6 gam bạc. a. Xác định công thức phân tử, viết công thức cấu tạo và gọi tên hai andehit trên? b. Bằng phương pháp hoá học hãy phân biệt mỗi andehit trên? Câu 10: (2,0 điểm) Cho m gam xenlulozơ tác dụng vừa đủ với 25,2 gam HNO3 có trong hỗn hợp HNO3 đặc và H2SO4 đặc, tạo thành 66,6 gam hỗn hợp X gồm xenlulozơ mononitrat và xenlulozơ đinitrat. Tính m và % khối lượng các chất trong hỗn hợp X. ---------- Hết ---------- (Cán bộ coi thi không giải thích gì thêm, học sinh được sử dụng bảng hệ thống tuần hoàn) Họ và tên thí sinh:....................................................................Số báo danh:...................................................