Physics Questions Practice Question and Answer
8 Q: What are the conditions for gas like Carbon monoxide to obey the ideal gas laws?
1323 063c8f745bdbddb32fda0e8d0
63c8f745bdbddb32fda0e8d0- 1Low temperature and low pressurefalse
- 2Low temperature and high pressurefalse
- 3High temperature and low pressuretrue
- 4High temperature and high pressurefalse
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Answer : 3. "High temperature and low pressure "
Explanation :
A real gas can behave as an ideal gas if volume of molecule is negligible and interaction between molecule is negligible. This will happen if number of molecule per unit volume is very small. This is only possible at high temperature and low pressure.
Q: What is the degree of dissociation for strong electrolytes?
1321 063c7ccbc8731ac33279b21f7
63c7ccbc8731ac33279b21f7- 11true
- 20false
- 3Less than 1false
- 4Greater than 1false
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Answer : 1. "1"
Explanation :
Strong electrolytes have a degree of dissociation close to one, while weak electrolytes have a degree of dissociation less than one. Solvent nature: Solvents with a high dielectric constant show more dissociation. Dilution: As the solution is diluted, the degree of dissociation increases.
Q: According to the law of reflection of light -
1320 05f6da417ff25c92a085bb0d5
5f6da417ff25c92a085bb0d5- 1The angle of incidence is greater than the angle of reflectionfalse
- 2The angle of incidence is equal to the angle of reflectiontrue
- 3The angle of incidence is smaller than the angle of reflectionfalse
- 4All the statements are truefalse
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Answer : 2. "The angle of incidence is equal to the angle of reflection"
Q: In case of negative work the angle between the force and displacement is-
1318 060892b3c0ac1df7d9f80ef4b
60892b3c0ac1df7d9f80ef4b- 10°false
- 245°false
- 390°false
- 4180°true
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Answer : 4. "180°"
Q: The observer hears a sound from the source which is moving away from the observer who is stationary. Determine the frequency of the sound
1316 063c8f650be373f6c954abbda
63c8f650be373f6c954abbda- 1It is halvedtrue
- 2It remains the samefalse
- 3It reaches infinityfalse
- 4It gets doubledfalse
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Answer : 1. "It is halved"
Explanation :
If the observer is moving away from the source ((Figure)), the observed frequency can be found: λs=vTo−voTovTs=(v−vo)Tov(1fs)=(v−vo)(1fo)fo=fs(v−vov).
Q: Which of the following elements has lowest melting point?
1310 162f32fca39a8157d97fb6e35
62f32fca39a8157d97fb6e35- 1Titaniumtrue
- 2Sulphurfalse
- 3Argonfalse
- 4Zincfalse
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Answer : 1. "Titanium"
Q: Consider copper and aluminum wire whose length and resistance are the same. Also, the specific resistance of aluminum is more than copper. Select the correct statement
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63c8d853b338bc336f0c3de7- 1Copper and aluminum mass are the samefalse
- 2Copper wire has more mass than the aluminum wirefalse
- 3Copper wire has less mass than the aluminum wirefalse
- 4The information given is incompletetrue
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Answer : 4. "The information given is incomplete "
Q: Degree of dissociation does not depend on which of the following factors?
1307 063c7cd09b338bc336f093b86
63c7cd09b338bc336f093b86- 1Nature of the solutefalse
- 2Nature of the solventfalse
- 3Soundtrue
- 4Concentrationfalse
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Answer : 3. "Sound "
Explanation :
The Degree of dissociation does not depend on catalyst.The equivalent conductivity of 0.1M weak acid is 100 times less than that at infinite dilution.