| 1 |
The vapour pressure of a liquid increase with the:<br> |
- A. increase pressure<br>
- B. increase of temperature<br>
- C. increase of intermolecular forces<br>
- D. increase of polarity of molecules<br>
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| 2 |
Bucky Balls are used as ________________ |
- A. Cutting
- B. Grafting
- C. Lubricants
- D. Nil
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| 3 |
When temperature of water drops to ____________ °C it convert onto ice. |
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| 4 |
Mass per unit volume is: |
- A. Velocity
- B. Dencity
- C. Pressure
- D. Nil
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| 5 |
Increase in ________________ increase evaporation. |
- A. Temperature
- B. Stronger
- C. All
- D. None of above
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| 6 |
In diamonds, carbon are ____________ bonded. |
- A. Tetrahedrally
- B. Single
- C. Double
- D. None
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| 7 |
Which has lowest density? |
- A. liquids
- B. Solids
- C. Gases
- D. Plasma
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| 8 |
The forces of attraction present between the molecules of a substance are called ____________ forces. |
- A. Intermolecular forces
- B. Covalent
- C. Ionic
- D. Nil
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| 9 |
Which one of the following does not affect the boiling point?<br> |
- A. intermolecular forces <br>
- B. external pressure<br>
- C. nature of liquid <br>
- D. initial temperature of liquid<br>
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| 10 |
Gases have fixed ____________ |
- A. Shape
- B. Volume
- C. Area
- D. Nil
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