Chemistry
One of the characteristics of a chemical reaction is :
- Catalyst
- Chemical bond
- Effervescence
- Evolution of gas
Chemical Reaction
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Answer
Evolution of gas
Reason — One of the characteristics of a chemical reaction is the evolution of a gas. This means that during some chemical reactions, one or more of the products can be a gas.
A catalyst is a substance that speeds up a reaction, not a characteristic of the reaction itself. Chemical bonds are part of substances, not a visible sign of a chemical reaction. Effervescence (bubbling) is one specific type of gas evolution, but not always present in all reactions.
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