Acidity order among drawn acids and phenols

14 questions on Acidity order among drawn acids and phenols from the General Organic Chemistry II: Acids and Bases chapter: 3 NEET level, 6 JEE Main, 5 JEE Advanced. Each one opens with its answer and solution.

• Four carboxylic acids are shown beside the options (the compound drawn under the question is only a reference acid). Which structure is the strongest acid? NEET level, drawn structure
• Four phenols are shown beside the options (the drawn compound is the parent phenol). Which structure is the weakest acid? NEET level, drawn structure
• Four para-substituted benzoic acids are shown beside the options (the drawn compound is benzoic acid, for reference). Which structure is the strongest acid? NEET level, drawn structure
• Four compounds are shown beside the options (the drawn compound is ethene, for reference). Which structure is the weakest acid? JEE Main level, drawn structure
• Four dicarboxylic acids are shown beside the options (the drawn compound is glutaric acid, for reference). Which structure has the lowest pKa1? JEE Main level, drawn structure
• The compound shown is an unsaturated diacid. Compared with its geometric isomer, its pKa1 and pKa2 are respectively JEE Main level, drawn structure
• The compound shown is a nitrophenol. Select ALL the correct statements about it. JEE Main level, drawn structure
• Four hydroxybenzoic and related acids are shown beside the options (the drawn compound is p-hydroxybenzoic acid, for reference). Which structure is the stronges... JEE Advanced level, drawn structure
• Four chlorinated acids are shown beside the options (the drawn compound is propanoic acid, for reference). Which structure is the strongest acid? JEE Main level, drawn structure
• Four benzoic acids are shown beside the options (the drawn compound is benzoic acid, pKa 4.20). Select ALL the structures that are stronger acids than the drawn... JEE Advanced level, drawn structure
• Four phenols are shown beside the options (the drawn compound is phenol, pKa 10.0). Which structure is the strongest acid? JEE Advanced level, drawn structure
• The compound shown is treated with aqueous sodium hydrogen carbonate (the conjugate acid, carbonic acid, has pKa1 about 6.4); only an acidic group with pKa clea... JEE Main level, drawn structure
• The compound shown is an ortho-substituted phenol. Select ALL the correct statements. JEE Advanced level, drawn structure
• Four carboxylic acids are shown beside the options (the drawn compound is acrylic acid, pKa 4.25, for reference). Which structure is the strongest acid? JEE Advanced level, drawn structure