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This post was last edited by sunjl1981 on 2013-1-6 at 22:55. To encourage active participation from members, 3 wealth points are given for each correct answer; if a calculation process is provided, or if a proper reason is given, an additional reward of 3 to 6 wealth points is awarded. I believe it’s not about the quantity, but having a reward is enough. The key is everyone’s active participation and progressing together. (Note: Only moderator ratings are valid for this post; other ratings are invalid.) Multiple-choice questions: 1. The basic methods of extinguishing fires include ( ) A. Isolation method B. Cooling method C. Smothering method D. Interruption of chemical reactions 2. Which of the following statements is correct? ( ) A. The reaction between Cl2 and H2 produces ClO-. B. The presence of ClO- is unfavorable for the production of alkalis. C. ClO- has strong reducing properties. D. ClO- has no corrosive properties. 3. Since the overpotential of Cl- is lower than that of OH-, ( ) is produced at the anode. A. H2 B. Cl2 C. H2 and Cl2 D. NaOH Please hide your replies; ratings will not be given unless replies are hidden. For instructions on how to hide replies, click here: Hiding method. Answer using the same IP; only the first post is valid. Also, be careful when posting – edits are invalid! Thank you all! Answer key: 1.ABCD 2.B 3.B # hcbbs
1 ABC 2 B 3 B 1# Yienuo Zhang
1ABCD 2B Is the hydrogen of A water? 3B
1.abcd 2. abc9 t; L' y2 O/ \' w; b7 s7 Z) {3.b