UPSC NDA I 2019 General Ability Solved Paper

Concept:An organic acid contains carbon and a carboxyl group ($\mathrm{-COOH}$), while inorganic acids do not have carbon skeletons.Explanation:Acetic acid ($\mathrm{CH_3COOH}$) has a carboxyl group and is a carboxylic acid, making it organic.Hydrochloric acid ($\mathrm{HCl}$), nitric acid ($\mathrm{HNO_3}$), and sulphuric acid ($\mathrm{H_2SO_4}$) are all inorganic acids because they lack carbon.Among the given options, only acetic acid is an organic acid.Answer:C. Acetic acid