What does an upward arrow ( \uparrow ) after a product in a chemical equation indicate?
Answer and explanation
Correct answer: Evolution of a gas
In a chemical equation, an upward arrow
(
\uparrow
) written with a product indicates that a gas is formed and evolves. For example, hydrogen gas is produced when zinc reacts with dilute hydrochloric acid. In contrast, a downward arrow
(
\downarrow
) indicates the formation of a precipitate.
Frequently asked questions
What is the correct answer to this question?
Evolution of a gas
Why is this the correct answer?
In a chemical equation, an upward arrow
(
\uparrow
) written with a product indicates that a gas is formed and evolves. For example, hydrogen gas is produced when zinc reacts with dilute hydrochloric acid. In contrast, a downward arrow
(
\downarrow
) indicates the formation of a precipitate.
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.
