Unit 4 The liquid state qns

Unit 4 The liquid state qns - 1 THE LIQUID STATE THE LIQUID...

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1 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 THE LIQUID STATE THE LIQUID STATE Select the lettered item which best completes each of the following : 1. The liquid state is characterised by the fact that (a) liquids have definite volumes (b) the intermolecular forces are moderate (c) the mean free path is nearly equal to the molecular diameter (d) all of these 2. The vapour pressure of a liquid (a) always increases with temperature (b) always decreases with temperature (c) is independent of temperature (d) increases only up to the boiling point 3. Liquids diffuse slowly as compared to gases because (a) liquids have no fixed shape (b) the molecule of liquids are heavy (c) the mean free path of the molecules of liquids is very short (d) the molecules are held together by strong intermolecular forces 4. The height to which a liquid will rise in a capillary tube which it wets is inversely proportional to the (a) temperature (b) air pressure (c) surface tension (d) the radius of the tube 5. With increase in temperature surface tension of a liquid (a) decreases (b) increases (c) remains constant (d) increases upto boiling point 6. The rise of a liquid in a capillary tube which it wets is due to (a) osmosis (b) diffusion (c) viscosity (d) surface tension 7. The S.I. units of surface tension are (a) dynes/cm (b) Nm –1 (c) Nm 2 (d) none of these 8. Which of the following liquids is expected to have the highest surface tension ? (a) water
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Unit 4 The liquid state qns - 1 THE LIQUID STATE THE LIQUID...

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