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41
Alum is commercially produced from
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Answer: Option D
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42
Which of the following is not an abrasive material ?
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Answer: Option A
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43
Ethanol amine is produced using ammonia and
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Answer: Option B
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44
Hydrocynic acid (HCN) is used as an insecticide for
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Answer: Option D
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45
Sodium bisulphite is used for __________ water.
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Answer: Option C
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46
Zeolite is used in the
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Answer: Option A
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47
Chloral is used in the manufacture of
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Answer: Option A
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48
Mannheim furnace is used in the manufacture of
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Answer: Option A
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49
Fourdrinier machine is used in the manufacture of
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Answer: Option B
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50
Yeast is used in the manufacture of
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Answer: Option C
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