初二下期末模拟卷（The next final simulation volume）.doc

初二下期末模拟卷（The next final simulation volume） This article is contributed by the broad sky star Doc documents may have a poor browsing experience at the WAP end. It is recommended that you choose TXT, or download the source file to the native view. The second semester of the second semester of the second semester of 2008, the second semester of the second semester of the second semester, the eighth grade science quality research volume of eighth grade science The volume I (choice is A 40 points) may use this volume relative atomic mass: Mn: 55 C: 12 O: 16 Cl: 35.5 S: 32 Al: 27 N: P: 14 31 F: 19 Na: 23 Mg: 24 K: 39 Ag: 108 A, choice: (2 points per item, A total of 40 points) 1, the following material in oxygen burning, can produce bright violet flame is () a. b. red phosphorus sulfur c. d. wire charcoal 2, the change of the oxide mercury when heated available below said (mercury atoms illustration cuhk circle, small circle said oxygen atoms). According to the wrong conclusion is () A, mercuric oxide can decompose when heated to B, mercury and oxygen atom is the smallest particle C in chemical change, molecule in the chemical change can be divided into D, all matter is made up of molecules 3, A material contains only one element, the analysis of the material is A true, it must be pure, B must be C, the mixture must be elemental D, not A compound 4, and in the figure ( ) () the two atoms of different elements, the following box indicates that the mixture is ( ) 5, according to the equation of chemical equation A + 5O2 = 3CO2 + 4 H 2 O, the chemical formula of A is - (A, CH 4 B, C 2 H 4 C, C 3 H 6 D, C 3 H 8) ) 6, some kind of nitrogen oxide, of which the quality of the nitrogen and oxygen ratio of o, then the number of oxides of nitrogen and oxygen atoms in the ratio of () A, 1 B, 2 C, 5 D, but 7200 8 years May 12 wenchuan big earthquake, in order to support the disaster area and epidemic prevention, the city emergency disinfection liquid producing peracetic acid, acetic