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In an unknown reaction, an insoluble white solid forms, but no noticeable temperature change is observed. What is the most appropriate conclusion?

Answer and explanation

Correct answer: A precipitation reaction is likely

The formation of an insoluble solid usually indicates the formation of a precipitate, so a precipitation reaction is the most likely conclusion. No noticeable temperature change does not prove that no reaction occurred; in some reactions, the thermal change may be too small to observe easily. Therefore, option B is incorrect, and a white precipitate alone cannot establish that the reaction is definitely exothermic or a decomposition reaction.

Related tags

Chemical ReactionsPrecipitation ReactionChemical EquationsInsoluble SolidClass 10 Science

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