Question

In which of the following media can sound travel through?
(i) Glass of water
(ii) Balloon full of air
(iii) Iron bar
(iv) Vacuum

• A. (i), (ii), (iii), and (iv)
• B. (i), (ii), and (iii) only
• C. (i) and (ii) only
• D. (ii) and (iii) only

Answer 1

The correct option is B (i), (ii), and (iii) only

Sound needs a medium to travel.
Out of the given four options, only in case of vacuum, there is no medium. Hence, only in the case of vacuum, the sound cannot travel.
Therefore, the correct options are (i), (ii), and (iii).