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When is using a downward arrow appropriate in a precipitation reaction?

Answer and explanation

Correct answer: When an insoluble solid forms

In a chemical equation, a downward arrow indicates a precipitate formed in a solution. A precipitate is an insoluble solid that separates from the liquid, so option A is correct. Gas evolution is commonly shown by an upward arrow, whereas heat and light are energy changes and are not represented by the downward precipitate symbol.

Related tags

ScienceClass10Chemical EquationsPrecipitationChemical SymbolsChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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