Class 9 Science MCQ Chapter 12 Sound

Class 9 Science MCQ Chapter 12 Sound, Class 9 Science MCQ Question Answer, Class 9 Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Science Class 9 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 9 Science MCQ Chapter 12 Sound Question Answer can be of great value to excel in the examination.

SCERT Class 9 Science MCQ Chapter 12 Sound

SCERT Class 9 Science MCQ Chapter 12 Sound Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 9 Science MCQ Chapter 12 Sound provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.

Sound

Chapter – 12

Multiple Choice Questions & Answers

1. Sound can not travel through – 

(a) air 

(b) water 

(c) steel 

(d) vacuum

Ans: (d) vacuum.

2. Sound is a –

(a) potential wave 

(b) kinetic wave

(c) mechanical wave 

(d) none of the above

Ans: (c) mechanical wave.

3. A peak is called –

(a) trough 

(b) crest

(c) wavelength 

(d) frequency

Ans: (b) crest.

4. A valley is called the –

(a) frough 

(b) crest 

(c) wavelength 

(d) frequency

Ans: (a) frough.

5. What is the S. I. unit of frequency? 

(a) Hz 

(b) Second

(c) metre 

(d) S

Ans: (a) Hz.

6. What is S. I. unit wavelength? 

(a) Hz 

(b) second

(c) metre 

(d) fout

Ans: (c) metre.

7. Which of the following is correct? 

(a) wavelength = speed × frequency 

(b) speed = wavelength × frequency 

(c) frequency = speed × wavelength 

(d) none of the above

Ans (b) speed wavelength × frequency.

8. A sound wave has a frequency of 2000 Hz and wave length 0.35 metre. What is the speed of sound wave? 

(a) 700m/s 

(b) 70m/s 

(c) 7m/s 

(d) 0.7m/s 

Ans: (a) 700m/s.

9. At 0.c, the speed of sound in air is – 

(a) 330ms⁻¹ 

(b) 331ms⁻¹ 

(c) 334ms⁻¹ 

(d) 344ˢ⁻¹

Ans: (b) 331ms⁻¹

10. At 22°c, the speed of sound in air is 

(a) 330ms⁻¹ 

(b) 331ms⁻¹

(c) 334ms⁻¹ 

(d) 344ms⁻¹ 

Ans: (d) 344ms⁻¹

11. At 25°c, the speed of sound in is water –

(a) 4700ms⁻¹ 

(b) 3980ms⁻¹

(c) 1531ms⁻¹ 

(d) 1498ms⁻¹

Ans: (c) 1531ms⁻¹  

12. The sensation of sound persists in our brain for about-

(a) 0.1 second 

(b) 0.2 second

(c) 0.3 second 

(d) 0.4 second

Ans: (a) 0.1 second.

13. The minimum distance for hearing dis. tinct echos from the source is – 

(a) 17.0 m 

(b) 17.2 m 

(c) 17.3 m 

(d) 17.4 m 

Ans: (b) 17.2 m

14. Which of the following is not musical instrument?

(a) frumpets 

(b) shehanais

(c) horms

(d) stethocope

Ans: (d) Stethocope.

15. Which of the following is medical instrument?

(a) Stethoscope 

(b) hornes  

(c) trumpets

(d) shehanais

Ans: (a) Stethoscope.