JEE Main Chemistry question
An acid with molecular formula C₇H₆O₃ forms three types of sodium salts, i.e. C₇H₅O₃Na, C₇H₄O₃Na₂ and C₇H₃O₃Na₃. The basicity of the acid is:
Answer: (C)
Solution
Formation of a trisodium salt shows three replaceable (acidic) hydrogens.