Why is an upward arrow associated with gas in a chemical equation?
Answer and explanation
Correct answer: Gas can escape upward when formed
In school chemical equations, an upward arrow is used to indicate that a gaseous product has been evolved and escapes from the reaction mixture. Thus option A correctly explains the symbol’s purpose. The arrow is not a general rule that every solid or liquid moves upward, and a precipitate is normally represented as an insoluble solid, often by a downward arrow when appropriate. Therefore options B, C, and D are incorrect.
Frequently asked questions
What is the correct answer to this question?
Gas can escape upward when formed
Why is this the correct answer?
In school chemical equations, an upward arrow is used to indicate that a gaseous product has been evolved and escapes from the reaction mixture. Thus option A correctly explains the symbol’s purpose. The arrow is not a general rule that every solid or liquid moves upward, and a precipitate is normally represented as an insoluble solid, often by a downward arrow when appropriate. Therefore options B, C, and D are incorrect.
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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