What does an upward arrow generally show in a chemical equation?
Answer and explanation
Correct answer: Evolution of gas
In chemical equations, an upward arrow (↑) generally indicates that a gas is evolved during the reaction and escapes from the reaction mixture. For example, an acid reacting with a carbonate releases carbon dioxide gas. The arrow does not mean that a solid forms, water is produced, or heat is removed; those changes require different descriptions or symbols.
Frequently asked questions
What is the correct answer to this question?
Evolution of gas
Why is this the correct answer?
In chemical equations, an upward arrow (↑) generally indicates that a gas is evolved during the reaction and escapes from the reaction mixture. For example, an acid reacting with a carbonate releases carbon dioxide gas. The arrow does not mean that a solid forms, water is produced, or heat is removed; those changes require different descriptions or symbols.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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