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Solution


Q.

A compound ‘X’ when treated with phthalic anhydride in presence of concentrated H2SO4 yields ‘Y’. ‘Y’ is used as an acid/base indicator. ‘X’ and ‘Y’ are respectively  [2023]
1 Toluidine, Phenolphthalein  
2 Salicylaldehyde, Phenolphthalein  
3 Carbolic acid, Phenolphthalein  
4 Anisole, Methyl orange  

Ans.

(3)