第25713号自编九年级上第1、2章测试中考选择题72分训练 化学部分(3...（Number 25713rd, grade nine, the first, second chapter, test selection, 72 points, training, chemistry (3...）.doc

第25713号自编九年级上第1、2章测试中考选择题72分训练 化学部分(3...（Number 25713rd, grade nine, the first, second chapter, test selection, 72 points, training, chemistry (3...） This article is contributed by shihuir4064 DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. In grade nine, the first and two chapter tests the chemistry section (the test choice is 72 points, and the training chemistry part (3) The name of a class, the right choice: 4 points, a total of 24 points (1), nano materials as a new material in twenty-first Century the most promising of the nanotube is a kind of carbon atoms by the diameter of several - 9 nm (1nm = 10 m) of the hollow tube, the following error is A and nano carbon if the tube material is carbon dioxide produced in complete combustion, B, carbon nano tube is a new type of C organic compounds and nano carbon tube material pipeline, large surface area and strong adsorption capacity of D carbon nanotubes and stable chemical properties at room temperature (2), titanium and titanium alloy is considered to be an important material in twenty-first Century and they have many excellent properties, such as high melting point, low density, good plasticity, easy processing, titanium alloy and the body has very good compatibility . According to their main properties, is not practical for the following purposes: A. is used to do the fuse B. for the manufacture of space shuttle C. used to make artificial bone for the manufacture of D. (3.) ship making egg with main ingredients are salt, soda ash, lime and ash (the main component is K2CO3), water and other substances, making when they need to be mixed and stirred to the process of metathesis reaction there are A.1 B.2 C.3 D.4 (4.) in AgNO3 and C U (N O 3) 2 mixed solution, adding a certain amount of iron powder, after full reaction, found a small amount of new metal is precipitated; the white precipitate filtered solution wit