Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of_____________________?
Correct answer: A. Nitric acid
- A. Nitric acid
- B. Hydrochloric acid
- C. Methyl alcohol
- D. Formic acid
Explanation
A small addition of nitric acid lowers the freezing point of 35% oleum and helps prevent solidification during winter transport. Hydrochloric acid and organic alcohols are not the usual industrial additive for this service.
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