Why is a precipitate shown by a downward arrow in an equation?
Answer and explanation
Correct answer: Because it separates as an insoluble solid
A precipitate is an insoluble solid produced when two aqueous solutions react and one product cannot remain dissolved. It separates from the solution and settles or appears as a solid, so a downward arrow is used to indicate its formation. The symbol does not mean that the substance releases heat or light. A gas escaping is represented by an upward arrow, making option B the opposite notation and option A correct.
Frequently asked questions
What is the correct answer to this question?
Because it separates as an insoluble solid
Why is this the correct answer?
A precipitate is an insoluble solid produced when two aqueous solutions react and one product cannot remain dissolved. It separates from the solution and settles or appears as a solid, so a downward arrow is used to indicate its formation. The symbol does not mean that the substance releases heat or light. A gas escaping is represented by an upward arrow, making option B the opposite notation and option A 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.
