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Short Answer Type

41. What do you understand by ‘colligative’ property?

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42. Why is vapour pressure of solution of glucose in water is lower than that of water?

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43. Draw the vapour pressure versus compositon diagram for an idal solution.

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44. What are isotonic solutions? How do they differ from hypotonic and Hypertonic solutions?

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45. What is the relationship between the eubllioscopic constant and the elevation in boiling point of the solution?

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46. How is the alcohol and water are miscible in all proportions?

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47. Why do gases nearly always tend to be less soluble in liquids as the temperature is raised?

Answer:

Gas in liquid it generate a small quantity of heat so we can say that dissolution of gas in a liquid is a exothermic reaction.

Gas + liquid < --- > solution + heat

According to Le chatelier's principle when we increase the temperature in a exothermic reaction , the reaction will move to back ward direction that means solution will dissociate and will give gas .Hence with the rise of temperature gas will less soluble.

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