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Multiple Choice Questions

191. Which of the following compounds corresponds vant’t Hoff factor to be equal to 2 for dilute solution?

K₂SO₄
Na₂SO₄
Sugar
MgSO₄

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192. Molarity of a solution containing 1 g NaOH in 250 mL of solution is

0.1 M
1 M
0.01 M
0.001 M

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193. A molal solution is one that contains one mole of a solute in

1000 g of the solvent
one litre of the solvent
one litre of the solution
22.4 litres of the solution

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Short Answer Type

194. Define mole fraction of a component in a solution.

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195. State Henry's law about the solubility of a gas in a liquid.

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196. Define an ideal solution.

The solutions which obey Raoult’s law over the entire range of concentration are known as ideal solutions. The ideal solutions have two other important properties. The enthalpy of mixing of the pure components to form the solution is zero and the volume of mixing is also zero, i.e.,

ΔmixH = 0, ΔmixV = 0

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