What is 2+2?
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This SSC CGL Chemistry question asks: “What is 2+2?” The correct answer is 4. 2+2 = 4 Chemistry explains the composition, structure, properties and transformations of matter. A reliable answer begins by identifying whether the question concerns atomic structure, chemical bonding, periodicity, stoichiometry, acids and bases, redox chemistry, electrochemistry, organic nomenclature, metallurgy or everyday materials. Formulae and equations must be interpreted rather than memorised without context. Numerical problems require the correct molar mass, unit conversion and significant figures. Redox questions should identify oxidation as electron loss or increase in oxidation number and reduction as electron gain or decrease in oxidation number.