Which of the following is a Bronsted-Lowry acid?
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This SSC CGL Chemistry question asks: “Which of the following is a Bronsted-Lowry acid?” The correct answer is HCl. HCl donates a proton (H+) in solution making it a Bronsted-Lowry acid. NH3 is a base (proton acceptor). Acid basicity refers to the number of ionisable protons, not simply the number of hydrogen atoms written in a formula. Option A (“NaCl”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Option B (“NH3”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question.