Solved UPSC CDS/OTA Question
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Q · Acids, Bases and SaltsMedium · 45s
Which acid is used to remove ink spots?
TopicAcids, Bases and Salts
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Oxalic acid is used to remove ink stains and rust.
Final Answer: Option B - Oxalic acid