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If the container becomes cold and a gas also evolves in a reaction, what is the most careful conclusion?

Answer and explanation

Correct answer: Gas formed and the reaction may have absorbed heat

Two observations must be interpreted separately. Gas evolution is evidence that a new gaseous product may have formed, while cooling of the container suggests that the process may have absorbed heat from its surroundings, making it possibly endothermic. These observations do not prove combustion, because combustion specifically requires burning in oxygen. Filtration is a separation process and does not explain gas formation. Hence option A is the most careful conclusion.

Related tags

ScienceClass10Chemical ReactionsObservationsEndothermicGas EvolutionChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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