JEE Main 2002 — Some Basic Concepts Of Chemistry Question with Solution
From: AIEEE 2002
Question
With increase of temperature, which of these changes?
Choose an option
Show full solutionCorrect option: C
Correct answer
Cmolarity
Step-by-step explanation
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.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Some Basic Concepts Of Chemistry chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2002, covering the Some Basic Concepts Of Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.