NCERT In-text 12.2.2 — Q1 - Sound
Question: Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Answer: No, you will not be able to hear any direct sound produced by your friend on the moon because the moon has no atmosphere (vacuum), and sound waves cannot travel without a material medium.
Full step-by-step NCERT solution with diagrams on Something by Zero.