... phân biệt lọ đựng riêng biệt SO2 CO2 A dd Ba(OH)2 B dd Br2 C dd Ca(OH)2 D dd NaOH Câu 10 < /b> Có lọ nhãn đựng chất sau : NaCl, HCl, H2SO4, Na2SO4 hoá chất để nhận biết lọ A quì tím, NaOH B quì tím , BaCl2 ... O2, CO2 , SO2 Để thu O2 tinh khiết người ta cho khí qua dung dịch A HCl B Br2 C Cl2 D NaOH Câu 19 Chỉ dùng thuốc thử sau để phân biệt lọ đựng riêng biệt SO2 CO2 A dd Ba(OH)2...
... tutoring lessons • Help them their homework Many students • Set up an English have difficulty in speaking club learning English • Provide cassettes and videos in English TASK 2: WORK IN GROUPS ... Example: A:- Many students cannot buy all the required books What you think we should to help them? B:- I think we should ask the school headmaster to provide free textbooks for students from lo...
... finance 5 1B 52A 53C 54A 55A 56A 57C 58C 59D 60C 6 1B 62D 63C 6 4B 6 5B 66A 67D 6 8B 69C 7 0B 71D 72D 73A 74A 7 5B 76C 77A 78D 79C 80C 81D 8 2B 83D 84D 8 5B 86A 87A 8 8B 89D 9 0B 9 1B 9 2B 93A 94A 9 5B 96C 97A ... A test B we C not to open D told us to so 96 Our new neighbors had been living in Arizona since ten years before moving to their present house A Our new B had bee...
... A: Because people are killing endangered animals for fur , skin… Student B: I think killing endangered animals ………should be banned Student A: Yes I think so Student B: show thank ,say good bye ... good bye Have student change their role with < /b> another reason and measure Encourage students using sentences with < /b> should or shouldn’t Help students with < /b> difficult words / listen...
... hợp.(1,5đ) b) Nhận biết kim loại phương pháp hóa < /b> học < /b> (0,5đ) Cho biết: Al=27; Mg=24; S=32; O=16;Cu=64;Cl=35,5;Zn =65 SỞ GD-ĐT B NH ĐỊNH TRƯỜNG THPT VÕ GIỮ Mã đề : 268 ĐỀ KIỂM TRA < /b> HỌC KỲ II < /b> NĂM HỌC 2 010 < /b> ... Cl2 > Br2 >I2 >F2 B : I2 > Br2 >Cl2 >F2 C : Br2 > F2 >I2 >Cl2 D : F2 > Cl2 >Br2 >I2 Câu 10:< /b> Trong Halogen sau: F2, Cl2, Br2, I2, halogen phản ứn...