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2. Solutions
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Q38 of 62 Page 24

Explain the solubility rule “like dissolves like” in terms of intermolecular forces that exist in solutions.

“Like dissolves like” in solutions means that a solute dissolves in a solvent if their intermolecular interactions are similar. This means that if polar solutes can dissolve in polar solvents and non-polar solutes can dissolve in non-polar solvents.


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36

Components of a binary mixture of two liquids A and B were being separated by distillation. After some time separation of components stopped and composition of vapour phase became same as that of liquid phase. Both the components started coming in the distillate. Explain why this happened.

37

Explain why on addition of 1 mol of NaCl to 1 litre of water, the boiling point of water increases, while addition of 1 mol of methyl alcohol to one litre of water decreases its boiling point.

39

Concentration terms such as mass percentage, ppm, mole fraction and molality are independent of temperature, however molarity is a function of temperature. Explain.

40

What is the significance of Henry’s Law constant KH?

Questions · 62
2. Solutions
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