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Solutions

Short Answer Type

81. 50 mL of a liquid A when mixed with 50 mL of liquid B, the resulting volume is 100.5 ml. What do you think about nature of solution?

Answer:

The solution will show a positive deviation from Raoult’s law. Increase in volume means A-B attractions are weaker than A-A and B-B attractions.

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82. Mention two biological phenomena regulated by osmosis in plants and animals.

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83. What happens if pressure greater than osmotic pressure is applied on the solution separated by a semi-permeable membrane from the solvent?

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84. 10 mL of a liquid A was mixed with 10 mL of liquid B. The volume of resulting solution was found to be 19.9 mL. What do you conclude?

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85. Ethanol is an organic compound, yet it is freely miscible with water. Why?

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86. In cold countries, ethylene glycol is added to water radiators of cars during winter. Why?

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87. What is a semi-permeable membrane?

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Long Answer Type

88. Define the term solution. How many types of solutions are formed? Write briefly about each type with an example.

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Short Answer Type

89. Define the following terms:
Mole fraction

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90. Define the following terms:
Molality

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