Which option gives the correct meaning of upward and downward arrows in a chemical equation?
Answer and explanation
Correct answer: Upward arrow indicates gas and downward arrow indicates precipitate
In conventional chemical-equation notation, an upward arrow (↑) placed beside a product indicates that a gas is evolved, while a downward arrow (↓) indicates that an insoluble solid precipitate has formed. Thus option A gives both meanings correctly. These arrows do not represent heat, light, liquid, or metal. State symbols such as (g), (l), (s), and (aq) provide different information about physical state.
Frequently asked questions
What is the correct answer to this question?
Upward arrow indicates gas and downward arrow indicates precipitate
Why is this the correct answer?
In conventional chemical-equation notation, an upward arrow (↑) placed beside a product indicates that a gas is evolved, while a downward arrow (↓) indicates that an insoluble solid precipitate has formed. Thus option A gives both meanings correctly. These arrows do not represent heat, light, liquid, or metal. State symbols such as (g), (l), (s), and (aq) provide different information about physical state.
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.
