| 481. | When the movement of water molecules in liquid becomes equal to the molecules in vapor form, a state is called |
| a. | equilibrium |
| b. | constant |
| c. | ideal |
| d. | non-ideal |
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Answer: (a).equilibrium
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| 482. | Ionic bonding is very strong hence it needs a |
| a. | high temperatures |
| b. | low temperatures |
| c. | constant temperature |
| d. | high pressure |
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Answer: (a).high temperatures
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| 483. | When the gas liquefies, the molecules lose kinetic energy and experience increase |
| a. | forces of attraction |
| b. | volume |
| c. | density |
| d. | pressure |
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Answer: (a).forces of attraction
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| 484. | If we heat a solid, the |
| a. | vibration will increase |
| b. | forces of attraction will increase |
| c. | solid changes into gas |
| d. | none of above |
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Answer: (a).vibration will increase
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| 485. | The pressure which is being exerted by vapor in equilibrium state is known as |
| a. | vapor pressure |
| b. | equilibrium |
| c. | endothermic |
| d. | exothermic |
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Answer: (a).vapor pressure
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