30 đề luyện thi HSG Tỉnh

... octan CH3 CH3 CH2 CH2 C CH CH CH2 CH3 CH CH3 Cl Br CH3 3/ t S tăng dần CH3(CH2)3CH3 < CH3 - CH - CH - CH3 < CH3 - CH2 CH - CH2 - CH3 < CH3- (CH2)4 - CH3 (A) (B) CH3 CH3 (C) CH3 (D) (A) ... chấm đề thi HSG Hoá 98-99 (Lớp 12-Bảng A) Bài I: (5điểm) 1/ C2H5OH +O CH3COOH ThO ,30 0 C 2CH3COOH CH3COCH3 + H2O + CO2 CH3COCH3 + HCN CH OH C CH3 CN CH3 OH CH3 OH 2 C CH3 CH3 CH3 CN OH ... Cl B : 1s22s22p63s23p63d94s2: số oxy hoá +2 3/ 16 A : 1s22s22p63s23p4: số oxy hoá -2 29 1s22s22p63s23p33d4: số oxy hoá +4 1s22s22p63s23p63d104s1: số oxy hoá +1 2 1s 2s 2p 3s 3p 3d : số oxy hoá...

ĐỀ LUYỆN THI HSG TỈNH 4

... http://www.thuvienkhoahoc.com/dethi/H%C3%93A_H%E1%BB%8CC_L%E1%BB %9AP_9%2C _THI_ CHON_H%E1%BB%8CC_SINH_GIOI%2C_GIA_LAI » Hóa học, Học sinh giỏi Gia Lai, lớp 9, 2006 Bài từ Thư viện Khoa học VLOS ĐỀ THI HỌC SINH GIỎI ... xảy ( có) cho dung dịch KHXO4 tác dụng với : FeO, K2SO3, Cu, Al, BaCl2 Câu ( 1,5 điểm) Cho hợp chất hữu A có công thức phân tử C6H6 Biết A làm màu dung dịch Br2 Hãy đề nghị công thức cấu tạo phù ... thử : C2H4, C2H2, C2H6, CO2, SO2 Câu ( 2,25 điểm) Trình bày cách tách riêng chất khỏi hỗn hợp sau đây: CH3COOH, C2H5OH, CH3COOC2H5 Viết phương trình phản ứng xảy Từ chất CaCO3, H2O, CuSO4, KClO3,...

Tài liệu De luyen thi HSG Tinh 2010- 2011- so 2

... east A B C D She had the gardener to plant some trees A B C D Come up to my place and we will discuss it A B C D He has repeated urged the government to something about this A B C D 10 I have to ... the manager (satisfy) He drives so _that he often has accidents (care) Flowers are often _by bees as they gather nectar (fertile) I think these thin clothes are _for ... until 20 08 across the river A the first bridge was built B the first building of a bridge was C built the first bridge D was the first bridge built 20 Excuse me! I’m learning my lesson...

Gui Gv Toan 40 de luyen thi HSG tinh.doc

... THCS thi học sinh Giỏi lớn 27 ,số học sinh thi văn trờng thứ 10, số học sinh thi toán trờng thứ hai 12 Biết số học sinh thi trờng thứ lớn lần số học sinh thi Văn trờng thứ hai số học sinh thi ... Tính độ dài đoạn DE b, Chứng minh AD AB = AE.AC c, Các đờng thẳng vuông góc với DE D E lần lợt cắt BC M N Chứng minh M trung điểm BH ; N trung điểm CH d, Tính diện tích tứ giác DENM ... trung tuyến AM Đờng thẳng d cắt AB E cắt AC F a, Chứng minh AE AB = AF AC b, Chứng minh DE + DF =2AM 40 Đề 40* Câu1 (6 điểm): a) Chứng minh biểu thức: A= x ( x + 6) x - (x - x + 3) (2 - x ) -...

Đề luyện thi HSG tỉnh lớp 10 hay

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đề luyện thi hsg tỉnh môn tiếng anh 10

... people regard this invasion of the countryside as (9 DESIRE) and they have begun campaigning to try and save some aspects of (10 TRADITION) rural culture III In most lines of this text ... they were divisible by 400; the years 1700, 1800, 1900 and 2100 would not be considered leap years, while the years 1600 and 2000 would be This new Gregorian calendar was so accurate that today, ... of the traffic jam, Andrew couldn't get to the interview on time The traffic jam 10 This old car probably won’t last for more than three years It’s unlikely ……………………………………………………….……………...

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ĐỀ LUYỆN THI HSG CẤP TỈNH – ĐỀ 30 MÔN: TIẾNG ANH ppsx

... with a big lion They were walking down the street “Hey,you!” he said “What are you doing here with this lion? You can’t walk around the streets with a lion Take it to the Zoo !” “OK, officer I want...

Đề luyện thi HSG cấp tỉnh

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ĐỀ LUYỆN THI HSG CẤP TỈNH – ĐỀ 36 MÔN: TIẾNG ANH ppsx

... b and c My sister came an old school friend in the street this morning a with b along c across d off I know you worked really this semester a hardly b bad c good d hard is a story passed ... cup of tea? Do you like a cup of tea? B: Yes, please A: Would you mind if I moved this wardrobe? Could you move this wardrobe, please? B: I'm sorry, I can't I must go now A: I promise I will be ... windows? B: That would be nice Question 5: a) Fill in the blanks with suitable prepositions In this respect, French differs English Have you learned English a long time? You can meet me ...

ĐỀ LUYỆN THI HSG CẤP TỈNH – ĐỀ 35 MÔN: TIẾNG ANH docx

... but you welcome to come this way” You can see that in Japan you try to be modest and you should not show 10 too much If you don’t understand our culture, you will think this is very strange Question ... phoned me, it was my lunchtime When you phoned me, I Nobody knows anything about Pam’s past life Nothing This house was specially built for my uncle My uncle William never ... present, say, “I’m sorry this is such a small present” But in fact they have chosen the present very carefully When the meal is ready the hostess says, “We have nothing special for you today...