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Free Online Mock test for Class 10. We covered all the Free Online Mock test for Class 10 in this post for free so that you can practice well for the exam.
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Mock test for Class 10 Students
Which of the following accurately describes the speed of sound? (i) sound moves through a medium with a finite velocity. (ii) The speed of sound is lower in gases compared to Solids. (iii) sound travels faster at higher temperatures.
a) only (i)
b) (i) & (iii)
c) (i), (ii) & (iii)
d) (i) & (ii)
Option c – (i), (ii) & (iii)
Which statement about sound velocity is accurate?
a) It is independent of the type of medium
b) It is highest in gases and lowest in liquids
c) It travels fastest through Solids and slowest through liquids
d) It moves fastest in Solids and slowest in gases
Option d – It moves fastest in Solids and slowest in gases
Choose the incorrect statement regarding sound wave propagation:
a) sound can pass through water
b) sound can move through air
c) sound can travel through steel
d) sound can propagate in a vacuum
Option d – Sound can propagate in a vacuum
A vibrating object
a) always creates sound
b) might not generate sound if the vibration is minimal
c) produces sound based on its frequency
d) none of these
Option c – produces sound based on its frequency
What is the technique used by ships to determine ocean depth?
a) LASER
b) SONAR
c) Sonic boom
d) Reverberation
Option b – SONAR
Bats are able to detect objects at night due to the reflection of
a) Ultrasonic waves they emit
b) Ultrasonic waves from nearby surfaces
c) Supersonic waves from the bat
d) Supersonic waves reflected from obstacles
Option a – Ultrasonic waves they emit
A metallic bell is rung near a Solid wall. If the echo returns after 0.3 seconds and the speed of sound is 340 m/s, what is the wall’s distance?
a) 102 m
b) 11 m
c) 51 m
d) 30 m
Option c – 51 m
Consider the statements: 1. Two people on the moon can’t have a conversation. 2. Sound cannot travel in a vacuum. 3. Sound travels faster in Solids than in liquids or gases.
a) Only statement 3 is correct
b) Statements 1 and 2 are correct
c) Statements 1 and 3 are correct
d) All statements are correct
Option d – All statements are correct
Which of the following is incorrect?
a) Sound speed increases with temperature in air
b) Sound speed is unaffected by air pressure
c) Humidity causes sound speed in air to decrease
d) Amplitude and frequency don’t influence sound speed in air
Option c – Humidity causes sound speed in air to decrease
Review the statements: 1. A shorter flute creates lower-frequency sounds. 2. In rocks, sound moves as longitudinal elastic waves only.
a) Only statement 1 is correct
b) Only statement 2 is correct
c) Both statements are correct
d) Neither statement is correct
Option b – Only statement 2 is correct
Why can’t a large explosion on the Moon be heard from Earth?
a) The explosion emits very high-frequency sound waves
b) Sound needs a physical medium to travel
c) Sound gets absorbed by the Moon’s Atmosphere
d) Sound gets absorbed by the Earth’s Atmosphere
Option b – Sound needs a physical medium to travel
When a sound wave moves from one medium to another, which property stays constant?
a) Frequency
b) Amplitude
c) Wavelength
d) Speed
Option a – Frequency
Shock waves are generated when an object
a) vibrates while carrying an electric charge
b) vibrates at frequencies above 20,000 Hz
c) vibrates with an extremely large amplitude
d) moves faster than the speed of sound in the medium
Option d – moves faster than the speed of sound in the medium
Why can’t sound waves travel long distances easily?
a) They are absorbed by the air
b) Their frequency remains unchanged
c) They require very tall antennas
d) Their speed is too slow
Option a – They are absorbed by the air
At an antinode of a stationary wave, which property changes?
a) Only density
b) Only pressure
c) Both pressure and density
d) Neither pressure nor density
Option d – Neither pressure nor density
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