2011年全国初中化学竞赛初赛试题（The national junior high school chemistry competition 2011 test）.doc

2011年全国初中化学竞赛初赛试题（The national junior high school chemistry competition 2011 test） National junior high school chemistry competition Preliminary tests Description: 1. The total volume is 6 pages. The test time is 90 minutes and 100 marks. 2. Before you answer, make sure to fill in your candidate number and name with the pen or signature pen of black handwriting The corresponding position. 3. Please fill in the choice answer form on page 3 of the non-choice question. 4. Non-choice questions must be answered in the designated area of the test paper with a pen or a signature pen with a black handwriting; If needed, first Draw a line on the original answer and then rewrite it in the space next to it. Pencils and correction fluid are not allowed. 5. Relative atomic mass: h-1 c-12 O -16 Na - 23 Mg - 24 al-27 cl-35.5 ca-40 (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (2) (1) (1) (1) (1) (1) (1) (1) (1 1. The following natural phenomena must be chemically altered A. greenhouse b. cloud 2. There is a carbon dioxide gas (C3O2) in the atmosphere of Venus, which does not belong to C3O2 A. mixture b. purity c. compound d. oxide 3. The following common phenomena are explained by molecular viewpoint, and the error is The molecules are in constant motion B. The size of the molecules changes with the temperature C. Alcohol volatilizes -- the molecular spacing increases by D. Hydrogen and oxygen react to form water -- the molecules change The following experiment is wrong The food that people transform green plants through photosynthesis is called green food. The food provided by the sea is called blue food. Food made from microbial fermentation is called white food. Heres the white food A. rice b. alcohol c. peanut oil d. seaweed 6. The right image is a common label for treating gastropathy Part of it. The three tablets will be neutralized Stomach acid (excess hydrochloric acid) is correct is A. B. B. B. B 7. green chemistry requires industry to produce as little