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Q.

Which of the following will be used to remove rust stains on cloth?


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a

Alcohol

b

Oxalic acid solution

c

Kerosene oil

d

Lime 

answer is B.

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Detailed Solution

Cleaning and bleaching are two of oxalic acid's most common uses, particularly for rust removal (iron complexing agent). A household cleanser that contains oxalic acid is Bar Keepers Friend. Its ability to produce a stable water-soluble salt with ferric iron, ferrioxalate ion, makes it useful as a rust remover.
  
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