[Soda Ash Knowledge] Question of the Day (3) September 25, 2009
Thread Content
To celebrate the launch of this section, we are hosting a quiz with prizes (updated daily). Everyone is welcome to participate actively and provide valuable feedback and constructive suggestions. The maximum score for this event is 40 wealth points. Friendship ratings and duplicate ratings are not allowed. Each sub-question is worth 2 wealth points (fill-in-the-blank, multiple-choice, true/false types); each main question is worth 20 wealth points (essay-type and calculation types). All members now have permission to use hidden replies. Please cooperate actively. Starting from this period, items that are not hidden will, in principle, not be scored. Thank you all! Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Answers submitted from the same IP are allowed, but only the first post counts. Edited posts are not rated. (All questions are extracted from the “Question Bank for Technical Workers’ On-the-Job Training – Operators in Soda Ash Production”. The electronic version of this book can be downloaded from the Soda Ash Information Sharing Section: http://bbs.hcbbs.com/thread-13140-1-2.html) 1. For standard grade-I soda ash products, the total alkali content should reach ( ). A. 99.9% B. 99.0% C. 98.5% D. 98.0% 2. In the case of dense soda ash produced via the extrusion method, its salt content ( ). A. increases B. remains unchanged C. decreases D. is unpredictable 3. The primary use of ammonium chloride is ( ). A. fertilizer B. batteries C. electroplating D. printing 4. Soda ash is a type of ( ) salt. A. strong base B. strong acid C. strong acid with weak base properties D. strong base with weak acid properties 5. The main difference between light soda ash and dense soda ash lies in their ( ). A. chemical properties B. uses C. physical properties D. storage methods 6. Soda ash forms ( ) crystals; its appearance is that of ( ) crystals. The bulk density of light soda ash is ( ) g/cm³, while that of dense soda ash is ( ) g/cm³. 7. The ammonia-soda process for soda ash production generates a large amount of ( ) waste residue. The by-product of the ammonia-soda process is ( ).
BAADC heavy, colorless, 2.532, – calcium chloride, ammonium chloride
1. b 2. c 3. a 4. d 5. c 6. Sodium carbonate, white powder or fine granules, 0.45–0.7, 2 7. Calcium chloride, ammonium chloride
BCADC 6. Sodium carbonate, white powder, 0.45–0.7, :0.90 7. Calcium chloride, ammonium chloride
1b2b3b4d5a 6 fine particles, white powder, unknown, 0.8-1.2 7 calcium hydroxide, ammonium chloride
BBADA granular, white, 0.6, 1.0 kaolin, ammonium chloride
Reference answers:
1. For **standard grade-1 soda ash products, the total alkali content should reach (B)**
A. 99.9%
B. 99.0%
C. 98.5%
D. 98.0%
2. In heavy soda ash produced by the extrusion method, its salt content (B)
A. increases
B. remains unchanged
C. decreases
D. is unpredictable
3. The main use of ammonium chloride is (A)
A. fertilizer
B. batteries
C. electroplating
D. printing
4. Soda ash is a (D) salt
A. strong base
B. strong acid
C. strong acid and weak base
D. strong base and weak acid
5. The main difference between light soda ash and heavy soda ash lies in (B)
A. chemical properties
B. uses
C. physical properties
D. storage methods
6. Soda ash appears as (colorless monoclinic) crystals; its appearance is that of (white powdery) crystals. The bulk density of light soda ash is (0.45–0.7) g/cm³, while that of heavy soda ash is (0.9–1.2) g/cm³. 7. The ammonia-alkali method will produce a large amount of waste residue (calcium chloride). The by-product of the ammonia-soda process is (ammonium chloride).
1. For **standard grade-1 soda ash products, the total alkali content should reach (B)**
A. 99.9%
B. 99.0%
C. 98.5%
D. 98.0%
2. In heavy soda ash produced by the extrusion method, its salt content (B)
A. increases
B. remains unchanged
C. decreases
D. is unpredictable
3. The main use of ammonium chloride is (A)
A. fertilizer
B. batteries
C. electroplating
D. printing
4. Soda ash is a (D) salt
A. strong base
B. strong acid
C. strong acid and weak base
D. strong base and weak acid
5. The main difference between light soda ash and heavy soda ash lies in (B)
A. chemical properties
B. uses
C. physical properties
D. storage methods
6. Soda ash appears as (colorless monoclinic) crystals; its appearance is that of (white powdery) crystals. The bulk density of light soda ash is (0.45–0.7) g/cm³, while that of heavy soda ash is (0.9–1.2) g/cm³. 7. The ammonia-alkali method will produce a large amount of waste residue (calcium chloride). The by-product of the ammonia-soda process is (ammonium chloride).
1. For standard-grade soda ash products, the total alkali content should reach (B). A. 99.9% B. 99.0% C. 98.5% D. 98.0%
2. In the case of dense soda ash produced by the extrusion method, its salt content (C). A. increases B. remains unchanged C. decreases D. is unpredictable
3. The primary use of ammonium chloride is (A). A. fertilizer B. batteries C. electroplating D. printing
4. Soda ash is a type of (D) salt. A. strong base B. strong acid C. strong acid with weak base properties D. strong base with weak acid properties
5. The main difference between light soda ash and dense soda ash lies in their (C). A. chemical properties B. uses C. physical properties D. storage methods
6. Soda ash appears as (granular) crystals; its appearance is that of (white) crystals. The bulk density of light soda ash is ( ) g/cm³, while that of dense soda ash is ( ) g/cm³. 7. The ammonia-alkali method will produce a large amount of (calcium chloride) waste residue. The by-product of the ammonia-soda process is (ammonium chloride).
2. In the case of dense soda ash produced by the extrusion method, its salt content (C). A. increases B. remains unchanged C. decreases D. is unpredictable
3. The primary use of ammonium chloride is (A). A. fertilizer B. batteries C. electroplating D. printing
4. Soda ash is a type of (D) salt. A. strong base B. strong acid C. strong acid with weak base properties D. strong base with weak acid properties
5. The main difference between light soda ash and dense soda ash lies in their (C). A. chemical properties B. uses C. physical properties D. storage methods
6. Soda ash appears as (granular) crystals; its appearance is that of (white) crystals. The bulk density of light soda ash is ( ) g/cm³, while that of dense soda ash is ( ) g/cm³. 7. The ammonia-alkali method will produce a large amount of (calcium chloride) waste residue. The by-product of the ammonia-soda process is (ammonium chloride).
1. For standard-grade soda ash products, the total alkali content should reach ( ). A. 99.9% B. 99.0% C. 98.5% D. 98.0%
2. In the case of dense soda ash produced by the extrusion method, its salt content (B). A. increases B. remains unchanged C. decreases D. is unpredictable
3. The primary use of ammonium chloride is (A). A. fertilizer B. batteries C. electroplating D. printing
4. Soda ash is a type of (A) salt. A. strong base B. strong acid C. strong acid with weak base properties D. strong base with weak acid properties
5. The main difference between light soda ash and dense soda ash lies in their (C). A. chemical properties B. uses C. physical properties D. storage methods
6. Soda ash appears as (white) crystals; its appearance is that of white crystals. The bulk density of light soda ash is (0.5) g/cm³, while that of dense soda ash ranges from (0.95–1.2) g/cm³. 7. The ammonia-soda process for soda ash production generates large amounts of (CaCl2) waste residue. The by-product of the ammonia-soda process is (NH4Cl).
2. In the case of dense soda ash produced by the extrusion method, its salt content (B). A. increases B. remains unchanged C. decreases D. is unpredictable
3. The primary use of ammonium chloride is (A). A. fertilizer B. batteries C. electroplating D. printing
4. Soda ash is a type of (A) salt. A. strong base B. strong acid C. strong acid with weak base properties D. strong base with weak acid properties
5. The main difference between light soda ash and dense soda ash lies in their (C). A. chemical properties B. uses C. physical properties D. storage methods
6. Soda ash appears as (white) crystals; its appearance is that of white crystals. The bulk density of light soda ash is (0.5) g/cm³, while that of dense soda ash ranges from (0.95–1.2) g/cm³. 7. The ammonia-soda process for soda ash production generates large amounts of (CaCl2) waste residue. The by-product of the ammonia-soda process is (NH4Cl).