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Q. No.Three liquids of densities \(d,\) \(2d\) and \(3d\) are mixed in equal proportions of weights. The relative density of the mixture is:
| 1. | \(11d \over 7\) | 2. | \(18d \over 11\) |
| 3. | \(13d \over 9\) | 4. | \(23d \over 18\) |
Subtopic: Â Properties of Fluids |
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A boat carrying a number of large stones is floating in a water tank. What will happen to the water level if the stones are unloaded into the water?
| 1. | the water level remains unchanged. |
| 2. | the water level falls. |
| 3. | the water level rises. |
| 4. | the water level rises till half the number of stones are unloaded and then begins to fall. |
Subtopic: Â Properties of Fluids |
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Level 2: 60%+
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A liquid can easily change its shape but a solid can not because:
| 1. | the density of a liquid is smaller than that of a solid. |
| 2. | the forces between the molecules is stronger in solid than in liquids. |
| 3. | the atoms combine to form bigger molecules in a solid. |
| 4. | the average separation between the molecules is larger in solids. |
Subtopic: Â Properties of Fluids |
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