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Which option gives the correct meaning of upward and downward arrows in a chemical equation?

Answer and explanation

Correct answer: Upward arrow indicates gas and downward arrow indicates precipitate

In conventional chemical-equation notation, an upward arrow (↑) placed beside a product indicates that a gas is evolved, while a downward arrow (↓) indicates that an insoluble solid precipitate has formed. Thus option A gives both meanings correctly. These arrows do not represent heat, light, liquid, or metal. State symbols such as (g), (l), (s), and (aq) provide different information about physical state.

Related tags

ScienceClass10Chemical EquationsSymbolsGas EvolutionPrecipitateChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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