What is the correct meaning of an upward arrow in a chemical equation?
Answer and explanation
Correct answer: Evolution of gas
In a chemical equation, an upward arrow (↑) indicates that a gaseous product is evolved during the reaction. For example, an acid reacting with a carbonate may release carbon dioxide gas, which can be shown by this symbol. A downward arrow indicates a precipitate, while heat is written over the reaction arrow rather than represented by an upward arrow. Therefore, option A is correct.
Frequently asked questions
What is the correct answer to this question?
Evolution of gas
Why is this the correct answer?
In a chemical equation, an upward arrow (↑) indicates that a gaseous product is evolved during the reaction. For example, an acid reacting with a carbonate may release carbon dioxide gas, which can be shown by this symbol. A downward arrow indicates a precipitate, while heat is written over the reaction arrow rather than represented by an upward arrow. Therefore, option A is correct.
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.
