[Soda Ash Knowledge] One Question per Day (49) 2009.11.21
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Please hide the reply; no scoring will be given in principle if it is not hidden. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Posts that have been edited are not rated. (The topic for this issue is taken from page 72 of \"Technical Worker Training Question Bank – Soda Ash Production Operators.\" An electronic version of this book is available for download in the soda ash information sharing area: http://bbs.hcbbs.com/thread-13140-1-2.html) Multiple-choice questions: 11. Which of the following standard solutions are commonly used in soda ash plants? ( ) A. 0.1 mol/L H2SO4 B. 0.2 mol/L NaOH C. 0.025 mol/L EDTA D. 10 μg/ml zinc standard solution 12. Which of the following analysis methods do not belong to instrumental analysis? （） A. Flame photometry for measuring sodium content B. Austenite meter analysis C. pH meter for measuring pH value D. Spectrophotometry 13. Buffer solutions have （）。 A. Antiacid effect B. Alkaline-resistant effect C. Both antiacid and alkaline-resistant effects D. Solution dilution effect 14. In an aqueous solution, it is known that [H+] = 4×10-5 mol/L; then the pH value of this solution is (). A. 5 B. 4 C. 4.4 D 9.6
11. Which of the following standard solutions are commonly used in alkali plants? (ABC) A. 0.1 mol/L H2SO4 B. 0.2 mol/L NaOH C. 0.025 mol/L EDTA D. 10 μg/ml zinc standard solution. 12. Which of the following analysis methods do not belong to instrumental analysis? (B) A. Flame photometer for measuring sodium content; B. Austenometer analysis; C. pH meter for measuring pH value; D. Spectrophotometry. 13. Buffer solutions have (B). A. Antiacid effect B. Alkaline-resistant effect C. Both antiacid and alkaline-resistant effects D. Solution dilution effect 14. In an aqueous solution, it is known that = 4×10-5 mol/L; then the pH value of this solution is (C). A. 5 B. 4 C. 4.4 D 9.6
11、ABC 12、B 13、B 14、C
11.ABC 12.B 13.B 14.B
11. Which of the following standard solutions are commonly used in alkali plants? (A B C) A. 0.1 mol/L H2SO4 B. 0.2 mol/L NaOH C. 0.025 mol/L EDTA D. 10 μg/ml zinc standard solution 12. Which of the following analysis methods do not belong to instrumental analysis? (B) A. Flame photometry for sodium content; B. Austenite meter analysis; C. pH meter for measuring pH value; D. Spectrophotometry. 13. Buffer solutions have (B). A. Antiacid effect B. Alkaline-resistant effect C. Both antiacid and alkaline-resistant effects D. Solution dilution effect 14. In an aqueous solution, it is known that = 4×10-5 mol/L; then the pH value of this solution is (C). A. 5 B. 4 C. 4.4 D. 9.6 1# chen3jun
11.ABC 12.B 13.B 14.C
11ABC .12 B .13 B .14 C
11、ABC 12、cd 13、C 14、C