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This SSC CGL Chemistry question asks: “What is the pH of pure water at 25 degree C?” The correct answer is 7. At 25 degree C Kw = 10^-14 so [H+] = [OH-] = 10^-7.
The correct answer is 7.
FAQ
Common questions and clear answers for this topic.
Chemistry usually contributes a handful of questions within the General Awareness section, generally covering basic concepts rather than calculation-heavy problems.
Atomic structure, periodic table trends, acids-bases-salts, metals and non-metals, and carbon compounds are the areas that appear most consistently across past papers.
NCERT textbooks from classes 9 and 10 cover most of the conceptual base needed, though supplementing with general knowledge about everyday chemical compounds helps too.
Linking reactions to real-world examples, like rusting or antacids, makes them easier to recall than memorizing formulas in isolation.
Yes, a large part of the syllabus mirrors class 9 and 10 science, making school-level revision a practical starting point.
