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QJEEM02Ch4291: JEE Main 2002 Chemistry - Class 11 JEEM02Ch4291 Solution: With increase of temperature, which of these changes?
With increase of temperature, which of these changes?
Multiple Choice Options
- A molality
- B weight fraction of solute
- C molarity
- D mole fraction
Step-by-Step Verified Solution
Molarity =
Molality =
Mole fraction =
Weight fraction of solute =
KEY Concept : Those units which are volume related will be affected by the change in temperature.
The definition of molarity is - Number of moles of solute present in one litre of solution. From definition you can see it is depends on volume which increases with increasing temperature and decreases with decreasing temperature.
All the other three options (Molality, Mole fraction, Weight fraction of solute) are mass related units and temperature has no effect on mass.
Number of moles of solute
Volume of solution (in L)
Molality =
Number of moles of solute
Mass of solvent (in kg)
Mole fraction =
Number of moles of component
Total number of moles of all components
Weight fraction of solute =
Weight of a component
Total weight of solution
100 KEY Concept : Those units which are volume related will be affected by the change in temperature.
The definition of molarity is - Number of moles of solute present in one litre of solution. From definition you can see it is depends on volume which increases with increasing temperature and decreases with decreasing temperature.
All the other three options (Molality, Mole fraction, Weight fraction of solute) are mass related units and temperature has no effect on mass.