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Which state symbol represents the gaseous state of a substance in a chemical equation?

Answer and explanation

Correct answer: (g)

The correct answer is B: (g). In a chemical equation, the symbol written in brackets after a formula identifies the physical state of that substance. The letter g stands for gas or gaseous state, so CO₂(g) indicates gaseous carbon dioxide. Option A, (s), means solid. Option C, (l), means liquid. Option D, (aq), means aqueous, showing that the substance is dissolved in water rather than simply being a gas. A quick memory cue is to match the first letter of the English state names: s for solid, l for liquid, and g for gas. The aqueous symbol is different because aq refers to water-based dissolution, not to a fourth ordinary state like gas.

Related tags

Chemical EquationsState SymbolsGaseous StateClass 10 ScienceChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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