Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used_______________________?
Correct answer: A. As a lubricant
- A. As a lubricant
- B. As a rust preventive
- C. In hard water for cleaning of cloth
- D. As a foam depressant in distillation column
Explanation
Metallic soaps such as aluminium and calcium stearates form water-resistant, thermally stable lubricating greases. Although some may have protective applications, lubrication is the standard use intended here.
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