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

A.

0.1 M
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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

A.

1000 g of the solvent
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Two liquids A and B boils at 1450C and 1900C respectively. Which of them has a higher vapour pressure at 800C ?

‘A’ has higher vapour pressure at 800C.
 Liquid A has lower boiling point, So it is being more volatile and has high vapour pressure at 800 C

Because vapour pressure has an inverse relation ith boiling point.
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Define ‘mole fraction’ of a substance in a solution.


Mole fraction: Commonly used symbol for mole fraction is x and subscript used on the right hand side of x denotes the component.
It is defined as:
Mole fraction of a component =

Number of moles of the component Total number of moles of all the components


For example, in a binary mixture, if the number of moles of A and B are nA and nB respectively, the mole fraction of A will be
 
x =nAnA + nB

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Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What kind of solid solution is this likely to be?

It will be solid in solid type solution.
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