1. Hỗn hợp A gồm bột các oxit sau: FexOy, Al2O3, MgO, CuO. Cho khí CO dư đi qua A nung nóng đến khi phản ứng hoàn toàn được chất rắn B. Cho B vào dung dịch NaOH dư được dung dịch C và chất rắn D. Cho từ từ dung dịch HCl đến dư vào dung dịch C. Hòa tan D bằng dung dịch axit H2SO4 đặc, nóng, dư tạo thành SO2 (sản phẩm khí duy nhất). Viết các phương trình hóa học xảy ra. 2. Hỗn hợp X gồm 4 chất khí sau : CO2, SO3, SO2 và H2. Trình bày phương pháp hoá học nhận ra sự có mặt của các khí trong hỗn hợp X. Viết các phương trình phản ứng xảy ra.
S GIO DC V O TO THI NGUYấN K THI TH VO LP 10 THPT CHUYấN NM HC 2015-2016 THI TH THI KHO ST VO LP 10 NM HC 2015 - 2016 MễN THI: TON HC Thi giam lm bi: 120 phỳt (khụng k thi gian giao ) ( ) 2 20 80 + 45 + x +1 + Cõu 2: (1,0 im) Cho biu thc P = ữ: x x x x a) Rỳt gn biu thc P b) Tỡm x, bit P > nx y = Cõu 3: (1,0 im) Cho h phng trỡnh sau: x y = 605 a) Khụng dựng mỏy tớnh cm tay hóy gii h phng trỡnh trờn vi n = b) Tỡm n h phng trỡnh trờn vụ nghim Cõu (1,0 im) Trong mt phng ta Oxy, cho ng thng y = ax + b i qua im A ( 3;5 ) v song song vi ng thng y = x + 2015 Tỡm h s a, b ? Cõu (1,0 im) Rỳt gn biu thc sau: A = Cõu 5: (1,0 im) Cho phng trỡnh x ( m 1) x + 2m = ( 1) , m l tham s a) Chng minh rng phng trỡnh (1) luụn cú nghim vi mi m b) Tỡm m phng trỡnh (1) cú tng hai nghim bng Tỡm hai nghim ú 1 Cõu 6: (1,0 im) Gii phng trỡnh: x + + x + ữ+ 10 = x x Cõu 7: (1,0 im) Cho tam giỏc ABC vuụng ti A, ng cao AH Tớnh chu vi tam 25 giỏc ABCábit AC = 5cm v HC = cm 13 Cõu 8: (1,0 im) Cho hỡnh bỡnh hnh ABCD cú àA = 300 , AB = BD = 18 cm Tớnh di cnh AD v din tớch hỡnh bỡnh hnh ABCD Cõu 9: (1,0 im) Cho t giỏc li ABCD Gi M l im bờn t giỏc v N l mt im bờn ngoi t giỏc Bit cỏc t giỏc ABMD, BMCN l cỏc hỡnh bỡnh hnh ã ã ã v CBM Chng minh rng ãACD = MCB = CDM Cõu 10: ( 1,0 im ) Cho tam giỏc ABC vuụng ti A ng trũn ng kớnh AB ct cỏc cnh BC ti D Trờn cung nh AD ly im E ( E khỏc A v D) Kộo di BE ct AC ti F a) Chng minh rng DEFC l t giỏc ni tip b) Gi M l giao im ca DE v AC Chng minh rng AM = ME.MD -HT Lu ý: Giỏm th coi thi khụng gii thớch gỡ thờm! H tờn thớ sinh: S bỏo danh: P N V THANG IM THI KHO ST VO LP S GD & T THI NGUYấN 10 TRNG THPT CHUYấN NM HC 2015 - 2016 MễN THI: TON HC THI TH P N Cõu Cõu (1,0 im) im 4.5 16.5 + 9.5 + = 54 5+2 + = Ta cú : A = 0,25 0,5 0,25 a (0,5 im) + iu kin: x > 0, x Ta cú: P = x x x 1+ x x 2 = = Vy P = x +1 x x +1 x x ( Cõu (1,0 im) ( ) ( ữ: x + x ữ x x ) 0,25 0,25 b.(0,5 im) Ta cú: 2 x +1 > +1> >0 x x x x > (Do x + > ) x > x > Vy vi x > thỡ P > a) Vi n = , h phng trỡnh ó cho cú dng x y = x y = x y = x y = 605 x y = 6050 x y = 6050 3x = 6048 x = 2016 x y = y = 2015 P > Cõu (1,0 im) ) Vy h phng trỡnh cú mt nghim ( x; y ) l ( 2016;2015 ) nx y = y = nx ( *) b) Ta cú: x y = 605 y = x 3025 2 0,25 0,25 0,25 0,25 0,25 H phng trỡnh ó cho vụ nghim H (*) vụ nghim n = Cõu (0,5 im) Cõu (1,0 im) ( vỡ ó cú 3025 ) Vỡ ng thng y = ax + b i qua im A ( 3;5 ) nờn ta cú: 3a + b = (1) M ng thng y = ax + b song song vi ng thng y = x + 2015 a = nờn b 2015 Thay a = vo (1), ta c b = (tha b 2015 ) Vy a = 4; b = a (0,5 im) Phng trỡnh ó cho cú: 2 ' = ( m 1) ( 2m ) = m 4m + = ( m ) + > 0, vi mi m Vy phng trỡnh ó cho cú nghim vi mi m b (0,5 im) Gi x1 , x2 l hai nghim ca phng trỡnh (1) Theo nh lý Viột, ta cú: x1 + x2 = ( m 1) Do ú: x1 + x2 = ( m 1) = m = Khi ú, phng trỡnh (1) cú dng x x + = Gii phng trỡnh ny ta c x1 = 6; x2 = + + iu kin xỏc nh ca phng trỡnh: x Ta cú: 0,25 0,5 0,5 0,5 0,25 0,25 1 1 x + + x + ữ+ 10 = x + ữ + x + ữ+ 10 = x x x x 2 Cõu (1,0 im) 0,25 1 x + ữ + x + ữ+ = x x X = x+ t Phng trỡnh ó cho tr thnh: x X + X + = X = 2; X = 0,25 0,25 + X = : x + = x + x + = x = x + X = x + = x + x + = x = Vy phng trỡnh ó x 0,25 cho cú ngim l: x = 1; x = Cõu (1,0 im) Hai tam giỏc vuụng ABC v HAC ng dng ( vỡ cú gúc chung gúc nhn ) nờn ta cú: C AC BC AC 25 = BC = = = 13 (cm) HC AC HC 25 13 p dng nh lý Pitago vo tam giỏc ABC, ta cú: 0,5 0,5 AB = BC AC = 132 52 = 12 (cm) Vy chu vi tam giỏc ABC l 12 + 13 + = 30 (cm) 0,25 Cõu (1,0 im) Theo gi thit BA = BD nờn tam giỏc ABD cõn B K ng cao BH thỡ H l trung im ca AD Xột tam giỏc vuụng AHB, cú BH = AB.sin A = 18.sin 300 = cm v AH = AB.cos A = 18.cos300 = cm Do ú : AD = AH = 18 (cm ( Khi ú din tớch ABCD l S ABCD = BH AD = 9.18 = 162 cm ) 0,5 0,25 0,25 Cõu (1,0 im) V hỡnh ỳng ã ã Ta thy t giỏc ADCN l hỡnh bỡnh hnh NA / / CD NAB = MDC (gúc cú hai cnh tng ng song song) ã ã ã ã Ta li cú CBM (theo gi thit) v MBC (hai gúc so le = CDM = NCB trong) ã ã Suy NAB M A, C nm trờn cựng mt na mt phng b NB, = NCB ú t giỏc ABNC ni tip c mt ng trũn ẳ = NBC ã ằ ) Ta cú: NAC ( hai gúc ni tip cựng chn cung NC ã ã ã M ãACD = NAC (hai gúc so le trong) v NBC (hai gúc so le = MCB trong) ã Vy nờn ãACD = MCB 0,5 0,25 1 ằ a) Ta cú: ãACB = (s ằAB - s ằAD ) = s DB 2 ã ằ ( gúc ni tip chn cung DB) 0,5 = s DB v BED ã ã BED = ACB ã ã M BED + DEF = 1800 ã ã DCF + DEF = 1800 Cõu 10 (1,0 im) Do ú, t giỏc DEFC ni tip mt ng trũn ã = s ằAE (gúc to bi tip tuyn v dõy cung) b) Ta cú: MAE ã v ãADM = s ằAE MAE = ãADM v ãAMD chung MA ME = AM = ME.MD Do ú MEA MAD MD MA MễN THI: TING ANH (dnh cho tt c cỏc thi sinh) Ngy thi: 16/ /2015 Thi gian lm bi: 90 phỳt (khụng k thi gian giao ) THI KHO ST (Thớ sinh lm bi trc tip vo thi theo hng dn di mi cõu) im Bng s Giỏm kho s (h tờn, ch ký) Giỏm kho s (h tờn, ch ký) S phỏch (do ch tch H ghi) Bng ch Bi thi ny gm cú trang c ỏnh s t 1-4 Thớ sinh kim tra s t bi thi trc lm bi Choose the word which has the underlined part pronounced differently from the rest Example: A thank B they C these D than Answer: A A walks B cups C students D pens A moment B slogan C comb D opposite A heal B hockey C exhaust D hole A washed B considered C booked D hoped A teenage B luggage C image D damage 0,5 II Give the correct form of the verbs in bracket - I (6- not realize). that I (7- leave) . the umbrella on the bus until it (8start) . to rain - We (9- wait) . for you at 8.00 tomorrow morning at the station - When I phoned Julia last night she (10-wash) . her hair and she (11- not finish) . when I finally (12- come) . - Everyone (13- hope) . that I will pass the entrance exam to Thai Nguyen gifted high school - I cant take any pictures because I (14- not/buy) . a new film yet - Youd better have your hair (15- cut) . 10 14 11 15 12 13 III Choose the best answer for each of the following sentences 16 It's a good idea to see your doctor regularly for. A a revision B a control C an investigation D a check-up 17 You have never been to Ha Long Bay, . ? A have you B haven't you C you have D you haven't 18 If it rains tomorrow, we shall have to. the match till Sunday A put off B cancel C play D put away 19 I don't know what to this evening What about . to the movies? A go B to go C going D goes 20 I don't like doing the . , especially cleaning the windows A homework B housework C job D occupation 21 Nguyen Du is considered a famous Vietnamese . A poem B poetry C poetic D poet 22 I don't usually like staying at hotels but last summer we spent a few days at . very nice hotel by . sea A a / ứ B a / the C the / a D ứ / the 23 This book is different . the one I had A with B to C from D at 24 What will happen if the pollution . on A puts B goes C keep D takes 25 He is the most humorous man . I have ever met A who B whose C that D which 26 My mother used to . research in this library when she was a student A make B C doing D making 27 I don't mind . home but I ' d rather . a taxi A to walk / to take B walking / taking C walk / taking D walking / take 28 . don't visit this part of the town A Most tourists B Most of tourists C The most tourists D Many tourist 29 " Does Jack know about your project" "Yes, I told him. to do" A what was I planning B what I have planned C what did I plan D what I was planning 30 How beautiful she is ! She is wearing a . A silk pretty purple dress B dress silk pretty purple C purple pretty silk dress D pretty purple silk dress 16 21 26 17 22 27 18 23 28 19 24 29 20 25 30 IV- There is a mistake in the four underlined parts of each sentence Find and correct the mistakes Example: They have been learning English since five years A B C D => Answer: C-> for 31 They didnt pay for the work They expected me doing it for nothing A B C D 32 The water and land around the chemical factory are serious polluted A B C D 33 After living in London for two months, my brother got used to drive on the left A B C D 34 I havent visited Mr Ba when he moved to his new house A B C D 55 Many people believe that New York is the most great city in America A B C D 31 33 35 32 34 V- Fill each blank of the following passage with one suitable word Tropical rain forests are found in Amazon region of South America, Central America, Africa, and South and Southeast Asia Rain forests (36) . very important (37) . the worlds climate The Amazon rain forest alone receives about 30 to 40 percent of the total rainfall on the earth and produces about the same (38) . of the worlds oxygen Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life Saving our rain forests is an international problem One country, or even a few countries cannot (39) . the problem alone The nations of the world must work together to (40) . a solution before it is too late 36 39 37 40 38 VI- Finish each of the following sentences in such a way that it means exactly the same as the sentence printed before it 41 It was such a hard cake that I couldnt eat it The cake. 42 I have never heard a more amusing story than this one This is.. 43 I spent one hour going to work by bicycle It took . 44 They built a new museum in the city center two months ago A new. 45 Can you give me a lift to school? he asked Mary He asked Mary. VII- Use the words or phrases given to make complete sentences 46 I find/ interesting/ talk/ Tom . 47 thank/ much/ your active cooperation . 48 soon / as/ I / get/ hotel/ I / phone you . 49 you/ not/ get good marks/ unless/ study/ harder . 50 when we/ come/ everyone/ go home . Total mark: 50 correct answers = 10 marks The end ANSWER KEY; S GIO DC V O TO THI NGUYấN K THI TH VO LP 10 THPT CHUYấN NM HC 2015-2016 MễN THI: TING ANH (dnh cho tt c cỏc thi sinh) Ngy thi: / /2015 Thi gian lm bi: 90 phỳt (khụng k thi gian giao ) THI KHO ST (Thớ sinh lm bi trc tip vo thi theo hng dn di mi cõu) im Bng s Giỏm kho s (h tờn, ch ký) Giỏm kho s (h tờn, ch ký) S phỏch (do ch tch H ghi) Bng ch Bi thi ny gm cú trang c ỏnh s t 1-4 Thớ sinh kim tra s t bi thi trc lm bi Choose the word which has the underlined part pronounced differently from the rest Example: Answer: A A walks [w:ks] A moment ['moumnt] A heal A thank B cups [kps] A teenage 1.D D opposite [koum] ['pzit] C exhaust ['hki] [ig'z:st] B considered D hole ['houl] C booked [kn'sidd] D hoped [bukt] B luggage [houpt] C image ['lgid] 2.D D Pens [penz] C comb B hockey ['ti:neid] D than C students ['slougn] [wt] C these ['stju:dnts] B slogan [hi:l] A washed B they ['imid] 3.C D damage ['dổmid] 4.B 5.A II Give the correct form of the verbs in bracket - I (6- not realize). that I (7- leave) . the umbrella on the bus until it (8start) . to rain - We (9- wait) . for you at 8.00 tomorrow morning at the station - When I phoned Julia last night she (10-wash) . her hair and she (11- not finish) . when I finally (12- come) . - Everyone (13- hope) . that I will pass the entrance exam to Thai Nguyen gifted high school - I cant take any pictures because I (14- not/buy) . a new film yet - Youd better have your hair (15- cut) . 6.didnt realize 10 was washing 14 havent bought had left 11 hadnt finished 15 cut started 12 came will be waiting 13 hopes III Choose the best answer for each of the following sentences 16 It's a good idea to see your doctor regularly for. A a revision B a control C an investigation D a check-up 17 You have never been to Ha Long Bay, . ? A have you B haven't you C you have D you haven't 18 If it rains tomorrow, we shall have to. the match till Sunday A put off B cancel C play D put away 19 I don't know what to this evening What about . to the movies? A go B to go C going D goes 20 I don't like doing the . , especially cleaning the windows A homework B housework C job D occupation 21 Nguyen Du is considered a famous Vietnamese . A poem B poetry C poetic D poet 22 I don't usually like staying at hotels but last summer we spent a few days at . very nice hotel by . sea A a / ứ B a / the C the / a D ứ / the 23 This book is different . the one I had A with B to C from D at 24 What will happen if the pollution . on A puts B goes C keep D takes 25 He is the most humorous man . I have ever met A who B whose C that D which 26 My mother used to . research in this library when she was a student A make B C doing D making 27 I don't mind . home but I ' d rather . a taxi A to walk / to take B walking / taking C walk / taking D walking / take 28 . don't visit this part of the town A Most tourists B Most of tourists C The most tourists D Many tourist 10 Tropical rain forests are found in Amazon region of South America, Central America, Africa, and South and Southeast Asia Rain forests (36) . very important (37) . the worlds climate The Amazon rain forest alone receives about 30 to 40 percent of the total rainfall on the earth and produces about the same (38) . of the worlds oxygen Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life Saving our rain forests is an international problem One country, or even a few countries cannot (39) . the problem alone The nations of the world must work together to (40) . a solution before it is too late 36 are 37 to 38 percentage 39 solve 40 find VI- Finish each of the following sentences in such a way that it means exactly the same as the sentence printed before it 41 It was such a hard cake that I couldnt eat it The cake. (The cake was so hard that I couldnt eat it The cake was too hard for me to eat) 42 I have never heard a more amusing story than this one This is.. (This is the first time I have heard such an amusing story This is the most amusing story that I have ever heard) 43 I spent one hour going to work by bicycle It took . (It took me one hour to go to work by bicycle.) 44 They built a new museum in the city center two months ago A new. (A new museum was built in the city center two months ago) 45 Can you give me a lift to school? he asked Mary He asked Mary. (He asked Mary to give him a lift to school He asked Mary if she could give him a lift to school) VII- Use the words or phrases given to make complete sentences 46 I find/ interesting/ talk/ Tom . I find it interesting to talk to Tom 47 thank/ much/ your active cooperation 12 . Thank you very much for your active cooperation 48 soon / as/ I / get/ hotel/ I / phone you . As soon as I get to the hotel, I will phone you 49 you/ not/ get good marks/ unless/ study/ harder . You wont get good marks unless you study harder 50 when we/ come/ everyone/ go home . When we came, everyone had gone home Total mark: 50 correct answers = 10 marks The end S GD & T THI NGUYấN P N THI KHO ST CHT LNG TRNG THPT CHUYấN U VO CHNH THC Nm hc : 2015- 2016 Mụn Húa Hc - Thi gian lm bi 150 phỳt Cõu ( im) Hn hp A gm bt cỏc oxit sau: Fe xOy, Al2O3, MgO, CuO Cho khớ CO d i qua A nung núng n phn ng hon ton c cht rn B Cho B vo dung dch NaOH d c dung dch C v cht rn D Cho t t dung dch HCl n d vo dung dch C Hũa tan D bng dung dch axit H 2SO4 c, núng, d to thnh SO2 (sn phm khớ nht) Vit cỏc phng trỡnh húa hc xy Hn hp X gm cht khớ sau : CO 2, SO3, SO2 v H2 Trỡnh by phng phỏp hoỏ hc nhn s cú mt ca cỏc khớ hn hp X Vit cỏc phng trỡnh phn ng xy Cõu í Ni dung 13 im - A gm FexOy, Al2O3, MgO, CuO tỏc dng vi CO d, nung núng n hon ton, cú cỏc PTHH: t CuO(r) + CO(k) Cu(r) + CO2(k) (1) t FexOy(r) + y CO(k) x Fe(r) + y CO2(k) (2) 0,25 - Sau (1), (2) c cht rt B gm: Fe, Al 2O3, MgO, Cu Cho B vo dung dch NaOH d, cú PTHH: Al2O3(r) + 2NaOH(dd) 2NaAlO2(dd) + H2O(l) (3) - Sau (3) c dung dch C gm NaOH, NaAlO cho vo dung dch HCl cú cỏc PTHH: NaOH(dd) + HCl(dd) NaCl(dd) + H2O(lg) (4) NaAlO2(dd) + HCl(dd) + H2O(lg) NaCl(dd) + Al(OH)3 (5) Al(OH)3 + 3HCl(dd) AlCl3(dd) + 3H2O(lg) (6) {Hay (5) v (6): NaAlO2(dd) + 4HCl(dd) NaCl(dd) + AlCl3(dd) + 2H2O(lg)} - Sau(3) c cht rt D gm: Fe, MgO, Cu Cho D vo dung dch H2SO4 c, núng, d, cú cỏc PTHH: MgO(r) + H2SO4(dd) MgSO4(dd) + H2O(l) (7) t 2Fe(r) + 6H2SO4(dd) Fe2(SO4)3(dd) + 3SO2 + 6H2O(lg) (8) t Cu(r) + 2H2SO4(dd) CuSO4(dd) + SO2 + 2H2O(lg) (9) - Ly mu khớ X lm thớ nghim: - Bc 1: Dn hn hp X qua dung dch BaCl (d) , nhn SO3 v loi b c SO3 ptp : SO3 + H2O +BaCl2 BaSO4 (trng) + 2HCl - Bc 2: Dn hn hp khớ sau i bỡnh dd BaCl vo dd Br2 (d), nhn v loi b SO ptp: SO2 + H2O +Br2 H2SO4 + 2HBr vng khụng mu - Bc 3: Dn hn hp khớ sau i bỡnh dung dch Br vo dung dch nc vụi (d) nhn v loi b CO2 0,25 0,25 0,25 0 14 0,25 0,25 0,25 ptp: CO2 + Ca(OH)2 CaCO3 (trng) + H2O - Bc 4: Khớ cũn li dn qua CuO/t0 nhn H2 t 0,25 ptp: H2 + CuO Cu + H2O (en ) () Cõu ( im) t chỏy hon ton 8,05 gam cht hu c M cha ( C, H, O) thu c 7,84 lớt khớ CO2 ( ktc) v 9,45 gam H2O T hi ca M so vi hiro bng 23 - Tỡm cụng thc phõn t, vit cỏc cụng thc cu to cú th cú ca M - Bit cht M tha s sau.(mi mi tờn l mt phng trỡnh phn ng) Xỏc nh cụng thc cu to ỳng ca M, vit cỏc phng trỡnh phn ng(dựng cụng thc cu to thu gn) hon thnh s trờn( ghi rừ iu kin phn ng nu cn) T nguyờn liu l tinh bt, cỏc cht vụ c tựy chn, cỏc cht xỳc tỏc cú vit cỏc phng trỡnh phn ng(ghi rừ iu kin phn ng nu cn) iu ch etyl axetat Cõu í Ni dung Ta cú: n CO = 0,35 mol; n H O = 0,525 mol; M M = 46 Cụng thc phõn t: C2H6O Cụng thc cu to CH3-CH2-OH; CH3-O-CH3 1500 C, ln 2CH4 CH CH + (1) Pd, t CH CH + H2 CH2=CH2 (2) H ,t CH2=CH2 + H2O CH3-CH2-OH (3) xt, t 2CH3-CH2-OH CH2=CH-CH=CH2 + 2H2O + H2 (4) xt, p, t nCH2=CH-CH=CH2 (-CH2-CH=CH-CH2-)n (5) HgSO , t CH CH + H2O CH3-CHO (6) Ni, t CH3-CHO + H2 CH3-CH2-OH (7) H SO d, 170 C CH3-CH2-OH CH2=CH2 + (8) xt, p, t nCH2=CH2 (-CH2-CH2-)n im o 0,25 0,25 2H2 o + 0,25 o 0,25 o o o 0,25 o o o 15 H2O 0,25 (9) H ,t (C6H10O5)n + nH2O nC6H12O6 mr C6H12O6 2C2H5OH + 2CO2 mg CH3COOH + H2O C2H5OH + O2 xt ,t C2H5OH + CH3COOH CH3COOC2H5 + H2O + o 0,25 0,25 Cõu ( im) Cho hn hp A gm (SiO2, Al2O3, Fe2O3) Tỏch riờng cỏc oxit hn hp, cho lng ca mi oxit khụng thay i so vi ban u Vit cỏc phng trỡnh phn ng xy T KMnO4, NH4HCO3, Fe, MnO2, NaHSO3, BaS v cỏc dung dch Ba(OH)2, HCl c cú th iu ch c nhng khớ gỡ? Vit phng trỡnh hoỏ hc Khi iu ch cỏc khớ trờn thng cú ln hi nc, lm khụ tt c cỏc khớ ú ch bng mt hoỏ cht thỡ chn cht no s cỏc cht sau õy: CaO, CaCl khan , H2SO4 c, P2O5, NaOH rn Cõu í Ni dung im S tỏch: 0,25 Nu hc sinh khụng vit s m trỡnh by cỏch lm hp lý cho im ti a Al2O3 + 6HCl 2AlCl3 + 3H2O Fe2O3 + 6HCl FeCl3 + 3H2O NaOH + HCl NaCl + H2O FeCl3 + 3NaOH Fe(OH)3 + 3NaCl 0,25 0,25 AlCl3 + 4NaOH NaAlO2 + 2H2O + 3NaCl t0 2Fe(OH)3 Fe2O3 + 3H2O CO2 + NaOH NaHCO3 16 0,25 CO2 + H2O + NaAlO2 Al(OH)3 + NaHCO3 t0 2Al(OH)3 Al2O3 + 3H2O Cỏc khớ cú th iu ch c gm O2, NH3, H2S, Cl2, CO2, SO2 t0 2KMnO4 K2MnO4 + MnO2 + O2 2NH4HCO3 + Ba(OH)2 Ba(HCO3)2 + 2NH3 + 2H2O Fe + 2HCl FeCl2 + H2 0,25 0,25 t0 MnO2 + 4HCl MnCl + Cl + 2H O 2 BaS + 2HCl BaCl2 + H2S NH4Cl + CO2 + H2O NH4HCO3 + HCl 0,25 NaHSO3 + HCl NaCl + SO2 + H2O lm khụ tt c cỏc khớ trờn cú ln hi nc m ch dựng mt hoỏ cht thỡ ta chn CaCl khan Vỡ ch cú CaCl2 khan sau hp th 0,25 hi nc u khụng tỏc dng vi cỏc khớ ú Cõu ( im) Cho m gam bt Cu vo 400 ml dung dch AgNO 0,2M, sau mt thi gian phn ng thu c 7,76 gam hn hp cht rn X v dung dch Y Lc tỏch X, ri thờm 5,85 gam bt Zn vo Y, sau phn ng xy hon ton thu c 10,53 gam rn Z v dung dch A ch cha mt cht tan Tớnh giỏ tr ca m Hũa tan hon ton m gam oxit MO ( M l kim loi) 78,4 gam dung dch H2SO4 6,25% (loóng) thỡ thu c dung dch X ú nng H 2SO4 cũn d l 2,433% Mt khỏc cho CO d i qua m gam MO nung núng, phn ng hon ton thu c hn hp khớ Y, cho Y qua 500 ml dung dch NaOH 0,1M thỡ ch cũn mt khớ nht thoỏt ra, dung dch cú cha 2,96 gam mui Xỏc nh kim loi M v lng m Cõu í Ni dung im n AgNO3 = 0,08 mol; vy dd A sau cựng cha cht tan l Zn(NO 3)2 Bo ton gc NO3- n Zn(NO3 )2 = 0,04 mol; Ta cú s túm tt: Bo ton lng ta cú: mCu + m AgNO + m Zn = m hhX + m Z + m Zn(NO ) m + 0, 08 ì170 + 5,85 = 7, 76 + 10,53 + 0, 04 ì189 m = 6,4 gam 17 0,25 0,25 nH SO 4(bd) = 78,4.6,25 = 0,05 (mol) ; Gi nMO = a mol 100.98 - Hũa tan MO vo dung dch H2SO4 loóng: MO + H2SO4 MSO4 + H2O mol: a a a => nH SO = (0,05 a) mol 0,25 4(du) mddsau pu = (M + 16)a+ 78,4 (gam) mMO = (M + 16)a = m (gam) 98(0,05 a) = 2,433% (I) Ta cú C%(H2SO4(du) ) = (M + 16)a+ 78,4 - Kh MO bng CO d t MO + CO M + CO2 a a a a Vy hn hp Y gm CO2 v CO d - Cho Y qua dd NaOH cú nNaOH = 0,5.0,1= 0,05 (mol) m ch cũn mt khớ thoỏt thỡ ú l CO, vy CO ó phn ng ht Phn ng cú th xy ra: CO2 + 2NaOH Na2CO3 + H2O k 2k k CO2 + NaOH NaHCO3 t t t => mmui = 106k + 84t = 2,96 (II) TH1: Nu NaOH d thỡ t = ( khụng cú mui axớt) => a = k = 0,028 Thay vo (I) ta c M = 348,8 (loi) 0,25 o TH2: Nu NaOH ht 2k + t = 0,05 (III) T (II) v (III) => k = 0,02 t = 0,01 => nCO = a = 0,03 (mol) Thay vo (I) c M = 56 => ú l Fe v m = (56 + 16).0,03 = 2,16 (g) 0,25 0,25 0,25 0,25 Cõu ( im) A l ru a chc cú cụng thc R(OH) n (R l gc hidrocacbon) Cho 12,8 gam dung dch ru A (trong nc) cú nng 71,875% tỏc dng vi Na d thu c 5,6 lit H2 ( ktc) Xỏc nh cụng thc phõn t ca A, bit lng phõn t ca A l 92 .v.C Cú a gam hn hp X gm mt axit no n chc A v mt este B B to bi mt axit no n chc A1 v mt ru no n chc C (A1 l ng ng k tip ca A) 18 Cho a gam hn hp X tỏc dng vi lng va NaHCO 3, thu c 1,92 gam mui Nu cho a gam hn hp X tỏc dng vi mt lng va NaOH un núng thu c 4,38 gam hn hp hai mui ca axit A, A v 1,38 gam ru C, t hi ca C so vi hiro l 23 t chỏy hon ton 4,38 gam hn hp hai mui ca A, A1 bng mt lng oxi d thỡ thu c Na 2CO3, hi nc v 2,128 lit CO2 (ktc) Gi thit phn ng xy hon ton Tỡm cụng thc phõn t, cụng thc cu to ca A, A1, C, B Cõu í Ni dung im mA = 12,8 x 0,71875 = 9,2g nA = 0,1 (mol) mH2O = 3,6gam; mH2O = 0,2mol nH2 = 0,25 (mol) 2H2O + 2Na 2NaOH + H2 (1) 0,25 0,2 0,1 (mol) 2R(OH)n + 2nNa 2R(Ona)n + nH2 (2) 0,1 n (mol) 0,05n (mol) T (1) v (2): nH2 = 0,1 + 0,05n = 0,25 mol n = Ta cú n = 3: Cụng thc l R(OH) cú lng phõn t ca A l 92 .v.C M[R(OH)3] = MR + 51 = 92 MR = 41 0,25 M R l gc hirocacbon nờn cú dng CxHy Ta cú: 12x + y = 41 (x, y l nhng s nguyờn dng) Xột t l x y 29 ( loi) 27 ( loi) -7 ( loi) Vy giỏ tr x = v y = l phự hp Cụng thc phõn t ca ru A l: C3H5(OH)3 (Glyxerol) hoc Propan-1,2,3- triol 0,25 t A l RCOOH (x mol), A1 : RCOOH , C : R1OH Este B : RCOOR1 (y mol) X + NaHCO3 : * RCOOH + NaHCO3 RCOONa + CO2 + H 2O 19 x * X + NaOH : x (R+67)x = 1,92 (1) 0,5 RCOOH + NaOH RCOONa + H 2O x x RCOOR1 + NaOH RCOONa + R1OH y y y *Ta cú: ( R + 67) x 14 43 + ( R + 67) y = 4,38 ( R + 67) y = 2, 46 1,92 (2) * M R OH = 23.2 = 46(C2 H 5OH ) y = 0, 03 T (2) ta c: ( R + 67)0, 03 = 2, 46 R = 15(CH ) * Khi nung hn hp mui: 4n + m + t0 )O2 Na2CO3 + (2n + 1)CO2 + mH 2O (2n + 1) x x(mol ) mol t0 2CH3COONa + 4O2 Na2CO3 + 3CO2 +3H 2O 0, 03mol 0, 015mol 2Cn H mCOONa + ( Ta cú: 0,5 (2n + 1) x 2,128 + 0, 045 = 22, Hay: (2n + 1) x = 0,1 x = 0,1 2n + (3) T (1) v (3): ( R + 67)0,1 = 1,92 R = 38, 4n 47,8 2n + T (4): n = (HCOOH) R 250C (tr vựng nỳi), biờn nhit nm nh + Ch ma khụng ng nht, Duyờn hi NTB ma vo thu ụng, khụ kộo di Nam B v Tõy Nguyờn ma t thỏng 5- thỏng 10, chim 80% lng ma c nm * Nguyờn nhõn ca s khỏc - Vi a lớ: Min Bc v BBB vi cao hn, gn tuyn, NTB v Nam B vi thp hn, gn Xớch o - Giú ụng bc: Bc v BBB chu tỏc ng mnh nht ca giú ụng bc, NTB v Nam B hu nh khụng chu nh hng * S phõn b dõn c cha hp lớ nc ta biu hin nh th no? - Khụng u gia ng bng ven bin v trung du, nỳi + ng bng chim 1/4 din tớch, 3/4 dõn s, mt dõn s cao (dn chng) + Trung du v nỳi chim 3/4 din tớch, 1/4 dõn s, mt dõn s thp (dn chng) - Khụng u gia thnh th v nụng thụn (dn chng), Dõn trung ụng cỏc ụ th ln, mt dõn s cao * S phõn b dõn c nh vy gõy khú khn gỡ? nh hng ln n khai thỏc s dng hp lớ lao ng ti nguyờn gia cỏc vựng (diờn gii) * Chng minh c cu GDP phõn theo ngnh kinh t nc ta chuyn dch theo hng cụng nghip húa, hin i húa 25 0,5 0,5 0,75 0,75 0,5 0,75 0,25 0,75 IV (3,0) - C cu KT theo ngnh chuyn dch theo hng tớch cc + Gim t trng ngnh nụng- lõm- ng nghip (dn chng) + Tng nhanh t trng ngnh cụng nghip- xõy dng (dn chng) + Ngnh dch v cú t trng khỏ cao, cũn nhiu bin ng - Chuyn dch theo hng tớch cc, nhng cũn chm, t trng ca ngnh nụng- lõm - ng nghip cũn khỏ ln * Nguyờn nhõn Kt qu ca cụng cuc i mi, quỏ trỡnh cụng nghip húa- hin i húa, xu th ca th gii * Tỡnh hỡnh phỏt trin du lch S khỏch ni a v khỏch du lch quc t, doanh thu du lch tng nhanh (dn chng) * Cỏc trung tõm du lch ch yu ca nc ta - Cỏc trung tõm du lch quc gia (dn chng) - Cỏc trung tõm du lch vựng (dn chng) * V biu - V biu ct kt hp ct vi ng trc tung, ỳng p, khoa hc cú y cỏc yờu cu: n v, ỳng khong cỏch thi gian tờn biu , chỳ gii (nu thiu, sai cỏc kớ hiu tr 0,25 im/ý) - V cỏc dng biu khỏc khụng cho im * Nhn xột: - Giai on 1990- 2009, din tớch gieo trng v sn lng c phờ u tng liờn tc v tng nhanh + Din tớch gieo trng tng (dn chng) + Sn lng c phờ tng (dn chng) - Sn lng c phờ tng nhanh hn din tớch gieo trng.Tc tng cú s khỏc gia cỏc giai on Vỡ ụng Nam B cú iu kin phỏt trin mnh ngnh kinh t bin? Do tip giỏp vựng bin rng ln, bin m, ng trng rng ln, hi sn phong phỳ, gn ng hng hi quc t Thm lc a nụng, rng, giu tim nng du khớ L vựng cú nn kinh t phỏt trin mnh -Ht 26 0,25 0,5 0,5 1,5 0,5 0,5 0,5 ... mark: 50 correct answers = 10 marks The end ANSWER KEY; S GIO DC V O TO THI NGUYấN K THI TH VO LP 10 THPT CHUYấN NM HC 2015-2016 MễN THI: TING ANH (dnh cho tt c cỏc thi sinh) Ngy thi: / /2015 Thi. .. : Giỏm th coi thi khụng gii thớch gỡ thờm! H tờn thớ sinh: S bỏo danh: P N V THANG IM THI KHO ST VO LP S GD & T THI NGUYấN 10 TRNG THPT CHUYấN NM HC 2015 - 2016 MễN THI: TON HC THI. .. x = 0,02 Vy: X gm: A: C2H5COOH, A 1: CH3COOH, C: C2H5OH, B: CH 3COOC2 H (4) 0,25 Ghi ch : Thớ sinh lm cỏch khỏc, ỳng cho im ti a S GD & T THI NGUYấN TRNG THPT CHUYấN ( thi cú trang) THI KHO ST