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QAIPMT-2010-Ch-2013: NEET 2010 Chemistry - Class 12 AIPMT-2010-Ch-2013 Solution: An aqueous solution is 1.00 molal in KI. Which change will…
An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?
Multiple Choice Options
- A Addition of NaCl
- B Addition of
- C Addition of 1.00 molal KI
- D Addition of water
Step-by-Step Verified Solution
Addition of solute decreases the vapour
pressure as some sites of the surface are occupied by
solute particles resulting in decreased surface area.
However, addition of solvent, i.e., dilution increases
the surface area of the liquid surface, thus results
in increased vapour pressure. Hence, addition of
water to the aqueous solution of (1 molal) KI results
in increased vapour pressure.