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This SSC CGL Chemistry question asks: “The valence shell of noble gas xenon can expand to how many electrons?” The correct answer is 12. Xenon (Period 5) can expand its valence shell using 5d orbitals.
The correct answer is 12.
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.
