A and B liquids on mixing produced a warm solution. Which type of deviation is there and why? 

Solution:
The process is exothermic, it means that there is + ve deviation because force of attraction between A-B is more than A-A or B-B.
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Define Henry's law about solubility of a gas in a liquid.

Henry’s law states that “the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution” and is expressed as:   p = KHx
where Khenry's constant

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Why does the molality of solution remains unchanged with rise in temperature?


Molality: Molality (m) is defined as the number of moles of the solute per kilogram (kg) of the solvent and is expressed as:

Molality (m) =Moles of solute Mass of solvent in kg


molality are independent of temperature, whereas molarity is a function of temperature. This is because volume depends on temperature
and the mass does not.

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Why does sugar dissolve in water?

Solution:
 sugar dissolves in water because when a sucrose molecule breaks from the sugar crystal, it is immediately surrounded by water molecules. The sucrose has hydroxyl groups that have a slight negative charge.
The positive charge of the oxygen found in the water molecule binds with the sugar. As the hydration shell forms around the sucrose molecule, the molecule is shielded from other sugar molecules so the sugar crystal does not reform.
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10 mL of liquid A was mixed with 10 mL of liquid B. The volume of the resulting solution was found to be 19.9 mL. What do you conclude?

It shows that solution is non-ideal showing – ve deviation in which force of attraction increases, volume decreases.
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