What does a downward arrow in a chemical equation indicate?
Answer and explanation
Correct answer: Formation of precipitate
In the usual school notation for a chemical equation, a downward arrow indicates that an insoluble solid has separated from the solution. Such a solid is called a precipitate, so the symbol denotes formation of a precipitate. A gas is commonly shown by an upward arrow, while heat and light are written as energy conditions or products rather than represented by this downward arrow. Hence option B is correct.
Frequently asked questions
What is the correct answer to this question?
Formation of precipitate
Why is this the correct answer?
In the usual school notation for a chemical equation, a downward arrow indicates that an insoluble solid has separated from the solution. Such a solid is called a precipitate, so the symbol denotes formation of a precipitate. A gas is commonly shown by an upward arrow, while heat and light are written as energy conditions or products rather than represented by this downward arrow. Hence option B 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.
