Multiple choice

Consider the following statements:

  1. Supersonic Jet causes pollution by thinning of ozone layer.
  2. Infrasonic sound waves are used to clean clothes and fine machinery parts.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement 1 is correct. Supersonic Jet, flying at stratosphere heights, causes a major disturbance in the ozone levels. Statement 2 is incorrect. Ultrasonic (frequency greater than the upper limit of the human hearing range) sound waves are used to clean clothes and fine machinery parts.

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