đề thi chọn học sinh giỏi cấp huyện đợt 2

... 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 0 ,25 (480 - x) 4/ 100 = 19 ,2 - 0,04x (g) - Khối lượng dung dịch KCl có dung dịch sau trộn là: 0 ,25 x + 19 ,2 - 0,04x = 0,96x + 19 ,2 ... 160 = 0,1 (mol) 2Na + 2H2O 2NaOH + H2 (k) (1) 2NaOH + CuSO4 Na2SO4 + Cu(OH )2 (r) (2) b Theo (1) : - Số mol H2 = 1 /2 số mol Na = 1 /2 0,4 = 0 ,2 (mol) - Thể tích khí H2 là: 0 ,2 22 ,4 = 4,48 (l) ... 399 ≈ 2% 0 ,25 0 ,25 0 ,25 0 ,25 4 2 4 Câu 0 ,25 0 ,25 0 ,25 n H = 8,96/ 22 ,4 = 0,4 (mol); VHCl= 400 ml = 0,4 (lít) m RCl = 125 30,4/100 = 38 (g) Theo ta có phương trình phản ứng: R + 2HCl RCl2 + H2 (k)...

Ngày tải lên: 03/06/2013, 01:26

Ngày tải lên: 29/10/2013, 11:38

... brothers / playing soocer / beach Best wishes, Hung Họ tên : ………………………………… Class : ……… Đề Kiểm tra học sinh giỏi lớp Môn : Anh Văn I ) Listen and complete the following schedule ( 1,5 ms ) Bài ... so that it has the same meaning as the first one ( 2ms ) ) This is a really delicicous dinner What ……………………………………………………………………………………… …! ) This new refrigerator is bigger than the old one The ... so that it has the same meaning as the first one ( 2ms ) ) This is a really delicicous dinner What ……………………………………………………………………………………… …! ) This new refrigerator is bigger than the old one The...

Ngày tải lên: 17/03/2014, 01:20

Ngày tải lên: 29/06/2014, 07:20

... gồm CH4; CO; CO2 Có tỉ lệ thể tích 4 :2: 1 Để oxi hóa hoàn toàn X phải dùng 10,08 l O2 Dẫn toàn sản phẩm sinh qua bình đựng dung dịch Ba(OH )2 17,1% phản ứng xong thấy tạo thành 49 ,25 g kết tủa Tính ... trình phản ứng xảy thí nghiệm sau : Cho hỗn hợp NaHCO3 NaHSO3 tác dụng với dung dịch Ba(OH )2 d Cho Fe d vào H2SO4 đặc, nóng thu đợc dung dịch X Cho dung dịch NaOH d vào dung dịch X thu đợc kết tủa ... đựng dung dịch Ba(OH )2 17,1% phản ứng xong thấy tạo thành 49 ,25 g kết tủa Tính khối lợng Ba(OH )2 dùng Câu 4(3 điểm): Cho 6,85g kim loại hóa trị II vào dung dịch muối sunfat cảu kim loại hóa trị...

Ngày tải lên: 02/07/2014, 17:00

... Fe2O3 B: H2 C: Fe X: H2O D: CuCl2 E: FeCl2 G: Cl2 I: NaOH K: Fe(OH )2 L: O2 Điểm 1,00 1,00 0,50 to → Fe2O3 + 3H2  2Fe + 3H2O Fe + CuCl2 → Cu + FeCl2 2FeCl2 + Cl2 → 2FeCl3 2FeCl3 + Fe → 3FeCl2 ... 36,5 - 0 ,25 44 = 32, 5 gam Phương trình phản ứng B: 2Al + 3H2SO4 → Al2(SO4)3 + 3H2 ↑ (2) Theo phương trình phản ứng theo đề ta có: 1,5a 98 27 a 1,5a .2 + = 32, 25 Giải được: a = 5,09 gam 27 27 27 8,96 ... H2 thu là: 7,84 n H2 = = 0,35(mol) 22 , - Hỗn hợp phản ứng với Cl2 tổng số mol Cl2 cần dùng là: 8, n Cl2 = = 0,375(mol) 22 , Gọi số mol Fe x, số mol M y: Fe + 2HCl → FeCl2 + H2 ↑ (1) x x 2M + 2nHCl...

Ngày tải lên: 05/07/2014, 13:20

... ỗi c âu đ úng đ ợc ểm 11 12 13 14 15 16 17 B A D D A A A A D 10 C 18 B 19 D 20 B 21 22 23 24 25 26 27 28 D B D C B A A D Part II: M ỗi c âu đ úng đ ợc ểm 31 mysterious 32 marriage 33 existence ... environments with appropriate lighting levels B C D THE END K Ỳ THI CH ỌN H ỌC SINH GI ỎI C ẤP HUY ỆN N ĂM H ỌC 20 08 -20 09 A M ÔN: TI ẾNG ANH L ỚP 12 H Ư ỚNG D ẪN CH ẤM ( B ản h ớng d ẫn ch ấm c ó 01 trang) ... one: 66 We haven’t seen this quiz show for two months →The last 67 It was two years ago at the end of this week that I started working here →By the end of this week ...

Ngày tải lên: 27/07/2014, 07:20

... here this morning Question 4: Fill in each blank with one suitable word The Browns live in the countryside Last week when they came up to London, they …1… their times in seeing as much as 2 ... night with us because he was missed the last bus I …… start on my new job on Monday She …… learn to things for herself I refuse to help her in future He …… stay the night with us and tomorrow he sets ... 2 Mrs Brown was most interested in stores, especially in Oxford Street, and bought some of …3… things which she could not find in the shops in the countryside Their two children, George and Susan,...

Ngày tải lên: 28/07/2014, 03:21

... him a few things, but Thomas was mostly self- educated His natural curiousty led him to start experimenting at a young age with electrical and mechanical things at home When he was 12 years old, ... a stolen car => The man is ……………………………………………………………………… We have a six o’clock deadline for this work => This work must………………………………………………………………… I had better get back to work => It’s time ………………………………………………………………………… ... of the electric light He also invented the photograph, the motion picture camera and over 1 ,20 0 other things Thomas Edison died at the age of 84 on October 18 in Jersey He left numerous inventions...

Ngày tải lên: 28/07/2014, 03:21

... 2 It was very of you to leave your bag on the bus We like to live in a quiet and _ village I received a lot of _ from my parents He usually thinks about his ... flowing D : reaching 11 What did that man say ? A : at you B : to you C : you D : for you 12 This is the first time I _ London A : visit B : visited C : have visited D : visit to 13 ... modernization Lao is famous for its hot _ A : industry B : area C : climate D : food He read this book last night, ? A : doesn’t he B : didn’t he C : hasn’t he D : isn’t he Are they...

Ngày tải lên: 28/07/2014, 03:21

... note This small dictionary 75,000 words A : makes B : uses C : comprises D : consists The mirror was _ broken A : accident B : accidently C : accidental D : by accident Is there anything ... B : expensive B : news B : certain B : international B : so B : in B : this B : which C : came C : ago C : popular C : things C : case C : internationly C : and C : for C : that C : what D : ... fits the blank space in the following passage : Television first (1) _ some fifty years (2) _ in the 1950s Since then, it has been one of the most (3) _ sources of entertainment...

Ngày tải lên: 28/07/2014, 03:21

... : Yes, I like B : I think so C : No, I hate it D : I’m the opposite 11 I suggest you should _ the windows in the summer A : to open B : opened C : open D : opening 12 “Let’s go to the pop ... televisions When television was new, we (2) turn (3) and watch whatever there was The fact that it was on TV was (4) for us to think it must be enjoyable But no that it ... _ Could you repeat that ? He lives in a _ house My father is the of this newspaper 10 Many people are _ in watching news COLLECT FLY COMFORT EXPLAIN WOOD EDITION...

Ngày tải lên: 28/07/2014, 03:21

... text and think of the word which best fits each space: Jack Pask and his…(1)….Dora were worried about their son Danny The boy stayed out too long, not coming home…. (2) ….very late at night This bad ... bottles of water,"Tam's father said "I will clean all the class windows,"said Trung "Help me to hang this picture, Ba," said Mai b) change the following sentences into passive form They have to pay ... can’t play any musical intrument - Despise………………………………………………… “ How long has it been since you left this city, Bod” ? - He wanted to know…………………………………… Rich families tend to send their children to...

Ngày tải lên: 28/07/2014, 03:21

... : Yes, I like B : I think so C : No, I hate it D : I’m the opposite 11 I suggest you should _ the windows in the summer A : to open B : opened C : open D : opening 12 “Let’s go to the pop ... televisions When television was new, we (2) turn (3) and watch whatever there was The fact that it was on TV was (4) for us to think it must be enjoyable But no that it ... _ Could you repeat that ? He lives in a _ house My father is the of this newspaper 10 Many people are _ in watching news COLLECT FLY COMFORT EXPLAIN WOOD EDITION...

Ngày tải lên: 08/08/2014, 05:21

... text and think of the word which best fits each space: Jack Pask and his…(1)….Dora were worried about their son Danny The boy stayed out too long, not coming home…. (2) ….very late at night This bad ... bottles of water,"Tam's father said "I will clean all the class windows,"said Trung "Help me to hang this picture, Ba," said Mai b) change the following sentences into passive form They have to pay ... can’t play any musical intrument - Despise………………………………………………… “ How long has it been since you left this city, Bod” ? - He wanted to know…………………………………… Rich families tend to send their children to...

Ngày tải lên: 08/08/2014, 05:21

... note This small dictionary 75,000 words A : makes B : uses C : comprises D : consists The mirror was _ broken A : accident B : accidently C : accidental D : by accident Is there anything ... B : expensive B : news B : certain B : international B : so B : in B : this B : which C : came C : ago C : popular C : things C : case C : internationly C : and C : for C : that C : what D : ... fits the blank space in the following passage : Television first (1) _ some fifty years (2) _ in the 1950s Since then, it has been one of the most (3) _ sources of entertainment...

Ngày tải lên: 08/08/2014, 05:21

... 21 “I’m taking my first exam next week” – “ ” A Cheers B Good luck C Well done D Congratulations 22 I’m not accustomed up so early A to getting B to get C by getting D get 23 I wish ... storm 120 kilometers per hour, it can damage a lot of things A arrives B comes C reaches D runs 29 A: “What a lovely house you have!” – B: “ ” A Of course not, it’s not costly B I think so ... studies 26 My teacher arrived after I for her ten minutes A waiting B was waiting C had waited D have waited 27 Nobody is ready to go, ? A isn’t he B is he C are they D aren’t they 28 When...

Ngày tải lên: 08/08/2014, 05:21

... UBND HUYỆN NGỌC HỒI PHÒNG GIÁO DỤC VÀ ĐÀO TẠO ĐỀ CHÍNH THỨC HƯỚNG DẪN CHẤM KỲ THI CHỌN HỌC SINH GIỎI CẤP HUYỆN LỚP NĂM HỌC 20 12- 2013 Môn: Sinh Khóa thi ngày: 24 /01 /20 13 Thời gian: ... tử XO (2n-1), phát triển thành bệnh… 0 .25 đ - Lập sơ đồ minh họa (0 .25 đ) Bài tập 1: -Tổng số Nuclê ô tít gen A là: N=4080x2x3.4 = 24 00 Nu -Số Nucl ê tít loại gen A là: A= T= 24 00 x 30 = 720 Nu ... là: A=T= 720 -1=719; G=X=480+1=481 Số iên kết hyđrô gen a: H = 2A +3G = 2. 720 +3.481 =28 81 Bài tập 2: Giải thích quy luật di truyền viết sơ đồ lai Phân tích cặp tính trạng ta có: Lơng đen 28 + 3:1...

Ngày tải lên: 08/07/2015, 09:24

... CHẤM KỲ THI CHỌN HỌC SINH GIỎI CẤP HUYỆN LỚP NĂM HỌC 20 12- 2013 Mơn: Anh văn Khóa thi ngày: 24 /01 /20 13 Thời gian: 150 phút (không kể thời gian giao đề) (Bảng hướng dẫn chấm gồm trang) I 20 điểm ... for/ on near but/ though/ even though/ although 10 things IV 20 điểm ( câu 2. 0 điểm) 1.It is three years since we (last) went to the theater 2. My father asked / told me not to go out at night ... gồm trang) I 20 điểm ( câu 2. 0 điểm) am going to be is having written traveling being laughed was built hasn’t had was riding / saw would be 10 be taken II 20 điểm ( từ 2. 0 điểm) carefully behavior...

Ngày tải lên: 08/07/2015, 09:25

... UBND HUYỆN NGỌC HỒI PHÒNG GIÁO DỤC VÀ ĐÀO TẠO HƯỚNG DẪN CHẤM CHÍNH THỨC KỲ THI CHỌN HỌC SINH GIỎI CẤP HUYỆN LỚP NĂM HỌC 20 12- 2013 MƠN: TỐN BÀI ĐÁP ÁN a/ A = x + 2 x − + x − 2 x − với x ≥ = = x 2 ... x 2 + + 0 .25 ( x − + 2) + ( x − − 2) = x − + 2x − + + x − − 2x − + THANG ĐIỂM 0 .25 x 2 − +) ≤ x < 4: B = 2 +) x ≥ 4: B = x 2 1 1 − + − − b/ B = 1− 2 3− 24 − 25 = - − + + - − + + 24 + 25 = -1 ... − ) 0 ,25 ) 0 ,25 3+ ) 1.0 0 ,25 +1   0 ,25 M = + − − M = = b/ Điều kiện để biểu thức C có nghĩa: x – ≠ ⇔ x ≠ x2 − x − + ( x + 2) ( x − 2) + 1 Ta có: C = = = = x+ 2+ x 2 x 2 x 2 x 2 Biểu thức C...

Ngày tải lên: 08/07/2015, 09:26