Physics Questions Practice Question and Answer
8 Q: Which of the following elements has the lowest melting point?
601 062de6dd1313eb40eb89fc72f
62de6dd1313eb40eb89fc72f- 1Chromiumfalse
- 2Hydrogentrue
- 3Zincfalse
- 4Silverfalse
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Answer : 2. "Hydrogen"
Q: What are the conditions for gas like Carbon monoxide to obey the ideal gas laws?
595 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: The amount of work done in moving a charge of 4C across two points having a potential difference of 6V is ______.
577 0641974a1b34a0b67fcf4a8bf
641974a1b34a0b67fcf4a8bf- 148 Jfalse
- 212 Jfalse
- 336 Jfalse
- 424 Jtrue
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Answer : 4. "24 J"
Q: Degree of dissociation does not depend on which of the following factors?
575 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.
Q: What does an electric dipole experience when it is kept in the non-uniform electric field?
574 063c8e9d71c47ef334be0efc0
63c8e9d71c47ef334be0efc0- 1Only a forcefalse
- 2Only torquefalse
- 3Force and torque bothtrue
- 4Neither force nor torquefalse
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Answer : 3. "Force and torque both"
Explanation :
An electric dipole always experiences a torque when placed in uniform as well as non-uniform electric field. But in non-uniform electric field, dipole will also experience net force of attraction. So the electric dipole in non-uniform electric field experiences both torque and force.
Q: Which of the following elements has the largest atomic radii?
562 06419aed45bff3d098df69c79
6419aed45bff3d098df69c79- 1Berylliumfalse
- 2Lithiumtrue
- 3Nitrogenfalse
- 4Carbonfalse
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Answer : 2. "Lithium"
Explanation :
Francium (Fr) has the highest atomic radius in the periodic table. It belongs to the alkali metals group. Its atomic number is 87. The periodic trend of atomic radius suggests that the atomic radius usually decreases along a period (left to right) and increases down a group (top to bottom).
Q: The capacity of parallel plate condenser is dependent on the
549 063c8e9831c47ef334be0ee88
63c8e9831c47ef334be0ee88- 1The separation between the platesfalse
- 2The metal used for the constructiontrue
- 3The thickness of the platefalse
- 4The potential applied across the platesfalse
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Answer : 2. "The metal used for the construction"
Explanation :
Therefore, the capacity of a parallel plate capacitor directly depends on the relative permittivity of dielectric material, the permittivity of space, the area of plates, and is inversely dependent on the separation between the plates.
Q: Find the molecular mass of a gas that takes three times more time to effuse as compared to He with the same volume
519 063c8f8598731ac33279f04bb
63c8f8598731ac33279f04bb- 19 ufalse
- 264 utrue
- 327 ufalse
- 436 ufalse
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Answer : 2. "64 u"
Explanation :
Its molecular mass will be: 64u.