| 1 |
Select the correct answer out of the following alternative suggestions London dispersion forces are the only forces present among the. |
- A. Molecules of water in liquid state
- B. Atoms of helium is gaseous state at high temperature.
- C. Molecules of solid I2
- D. Molecule of H-Cl gas
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| 2 |
Isomorphic crystals show |
- A. Same chemical properties
- B. Same physical properties
- C. Same crystalline form
- D. Same melting point
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| 3 |
The distillation of liquid under reduced pressure is called. |
- A. Destructive distillation
- B. Vaccum distillation
- C. Simple distillation
- D. Fractional distillation
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| 4 |
When liquid water changes to ice its volume expands. The expansion in volume is. |
- A. 5%
- B. 9%
- C. 10%
- D. 18%
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| 5 |
Crystal to diamond is. |
- A. Ionic
- B. Molecular
- C. Covalent
- D. Metallic
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| 6 |
Which liquid has low boiling point with. |
- A. Less intermolecular force and higher V.P
- B. Greater intermolecular forces and low V.P
- C. Bigger size and greater polarizability
- D. High hydrogen bonding in it
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| 7 |
The process in which liquid can be made to boil at low temperature in known as .........distillation |
- A. Simple
- B. Thermal
- C. Steam
- D. Vacuum
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| 8 |
The boiling point of glycerin at one atm is. |
- A. 280 <sup>o</sup>C
- B. 290 <sup>o</sup>C
- C. 100 <sup>o</sup>C
- D. 110 <sup>o</sup>C
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| 9 |
The polarizabilities of elements mostly increase down the group due to the reason that |
- A. The atomic numbers increase
- B. Number of protons increase
- C. Number of shells increase along, with increase of shielding effect
- D. The behavior of the elements remain the same
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| 10 |
The shape of diamond crystal is. |
- A. cubic
- B. Hexagonal
- C. Tetragonal
- D. Orthorhombic
|