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Solutions

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.

Henry's law state 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 = KH x

Here KH is the Henry’s law constant

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196. Define an ideal solution.

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197. Why is Van’t Hoff factor introduced in the equation for colligative properties of solutions?

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198. How is osmotic pressure dependent upon number of moles of solute?

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199. Define Van’t Hoff factor. What is its value for a non-electrolytic solution?

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200. Give one example each of the following solutions:
(i) Liquid in liquid, (ii) Gas in gas.

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