Question Paper
Class / Subject: Class 9 (SSC) · Science and Technology (विज्ञान आणि तंत्रज्ञान)
Chapter: Chapter 12 — Chapter 12: Study of Sound
Time Allowed: 32 minutes
Max Marks: 16
1. What type of wave is sound? [1]
(A) Longitudinal
(B) Transverse
(C) Electromagnetic
(D) No specific type
2. What do longitudinal waves create? [1]
(A) Compressions and rarefactions
(B) Only crests and troughs
(C) No specific pattern
(D) Only straight lines
3. Where does sound travel fastest? [1]
(A) Solids
(B) Liquids
(C) Gases
(D) Vacuum
4. Where does sound travel slowest? [1]
(A) Gases
(B) Solids
(C) Liquids
(D) It travels equally everywhere
5. What is the human audible range? [1]
(A) 20 Hz to 20,000 Hz
(B) 0 Hz to 100 Hz
(C) 1 Hz to 1,000,000 Hz
(D) No specific range
6. What is infrasound? [1]
(A) Sound below 20 Hz
(B) Sound above 20,000 Hz
(C) Sound within human range
(D) No such sound exists
7. What is ultrasound? [1]
(A) Sound above 20,000 Hz
(B) Sound below 20 Hz
(C) Sound within human range
(D) No such sound exists
8. Where is ultrasound used practically? [1]
(A) Medical imaging and cleaning
(B) Nowhere useful
(C) Only in music
(D) Only in movies
9. What type of wave is sound? [1]
(A) Longitudinal
(B) Transverse
(C) Electromagnetic
(D) No specific type
10. What do longitudinal waves create? [1]
(A) Compressions and rarefactions
(B) Only crests and troughs
(C) No specific pattern
(D) Only straight lines
11. Where does sound travel fastest? [1]
(A) Solids
(B) Liquids
(C) Gases
(D) Vacuum
12. Where does sound travel slowest? [1]
(A) Gases
(B) Solids
(C) Liquids
(D) It travels equally everywhere
13. What is the human audible range? [1]
(A) 20 Hz to 20,000 Hz
(B) 0 Hz to 100 Hz
(C) 1 Hz to 1,000,000 Hz
(D) No specific range
14. What is infrasound? [1]
(A) Sound below 20 Hz
(B) Sound above 20,000 Hz
(C) Sound within human range
(D) No such sound exists
15. What is ultrasound? [1]
(A) Sound above 20,000 Hz
(B) Sound below 20 Hz
(C) Sound within human range
(D) No such sound exists
16. Where is ultrasound used practically? [1]
(A) Medical imaging and cleaning
(B) Nowhere useful
(C) Only in music
(D) Only in movies