In a chemical equation, what do a downward arrow \(\downarrow\) and an upward arrow \(\uparrow\) written with products respectively indicate?
Answer and explanation
Correct answer: The downward arrow indicates a precipitate, and the upward arrow indicates evolution of a gas.
In a chemical equation, a downward arrow \(\downarrow\) is used for an insoluble solid product that separates from a solution and settles down; this is called a precipitate. An upward arrow \(\uparrow\) is used for a gas evolved during the reaction. Option B reverses the meanings of these two symbols.
Frequently asked questions
What is the correct answer to this question?
The downward arrow indicates a precipitate, and the upward arrow indicates evolution of a gas.
Why is this the correct answer?
In a chemical equation, a downward arrow \(\downarrow\) is used for an insoluble solid product that separates from a solution and settles down; this is called a precipitate. An upward arrow \(\uparrow\) is used for a gas evolved during the reaction. Option B reverses the meanings of these two 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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