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Solutions

Short Answer Type

91. Define the following terms:
Molarity

228 Views

92. Define the following terms:
Mass percentage.

177 Views

93. What role does the molecular interaction play in solution of alcohol and water?

151 Views

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

167 Views

Long Answer Type

95. State Henry’s law and mention some important applications.

1458 Views

96. What is meant by positive and negative deviations from Raoult’s law and how is the sign of Δ_mix H related to positive and negative deviations Raoult’s law?

1874 Views

Short Answer Type

97. Methanol is soluble in water but insoluble in octane. Explain briefly.

135 Views

98. Given below is the sketch of a plant for carrying out a process.

(i) Name the process occurring in the above plant.
(ii) To which container does the net flow of solvent take place?
(iii) Name one SPM which can be used in this plant.
(iv) Give one potential use of the plant.

Answer:

(i) Reverse osmosis.
(ii) Pure water is forced out of the solution to pass through the pores of the membrane in the opposite direction.
(iii) Parchment or cellophone.
(iv) This process is used in desalination to get salt-free water from sea water.

556 Views

Long Answer Type

99. Prove that the relative lowering of vapour pressure is equal to the mole fraction of non-volatile solute in the solution.

957 Views

Short Answer Type

100. Explain why freezing point of a solvent is lowered on dissolving a non-volatile solute into it? Give an important application of the phenomenon of depression in freezing point.

466 Views