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During a chemical reaction, the evolution of a gas is often identified by which observation?

Answer and explanation

Correct answer: Appearance of bubbles

When a gas is formed in a chemical reaction, it often escapes from the mixture or solution as bubbles. Therefore, the appearance of bubbles is a common sign of gas evolution. In contrast, filtration is a method of separating a solid from a liquid, not an indication that a gas has formed.

Related tags

Class 10 ScienceChemical ReactionsGas EvolutionBubblesChemical Change

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