What is the correct respective meaning of upward arrow and downward arrow?
Answer and explanation
Correct answer: Gas and precipitate
In a chemical equation, an upward arrow is written when a gaseous product is evolved and escapes from the reaction mixture. A downward arrow is used when an insoluble solid separates from a solution; this solid is called a precipitate. Therefore the respective meanings are gas and precipitate. The reverse order in option B confuses the two symbols, while heat, light, liquid and solid are not their standard meanings.
Frequently asked questions
What is the correct answer to this question?
Gas and precipitate
Why is this the correct answer?
In a chemical equation, an upward arrow is written when a gaseous product is evolved and escapes from the reaction mixture. A downward arrow is used when an insoluble solid separates from a solution; this solid is called a precipitate. Therefore the respective meanings are gas and precipitate. The reverse order in option B confuses the two symbols, while heat, light, liquid and solid are not their standard meanings.
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.
