Question

The solubility of a specific non-volatile salt
is 4 g in 100 g of water at 25°C. If 2.0 g, 4.0||
g and 6.0 g of the salt added to 100 g of water
at 25°C, in system X, Y and Z. The vapour
pressure would be in the order
(A)X<Y<Z (B)X>Y>Z
(C)Z>X=Y (D) X>Y=Z
​

Answer 1

vapour pressure is inversely proportional to solute conc.
hence order will be x>y>z

but the max amount of solute which is able to dissolve is only 4g/ 100g of water.
hence any solute con. above 4g will have same solubility as 4g hence there vapour pressure will also remain same
hence x and y soln will have same vapour pressure.
and vapour pressure is inversely proportional to solute concentration so x>y>z

Answer 2

Answer:

x>y=z

Explanation: 4g salt 100g water temperature 25 degree celcius

x  solute 2.0g   y - 4g   z-6g   saturared solution - a solution holds the maximum amount of solute 4g + 100g --- saturated solution  [2g]  100g water-completely dissolved         [6g]   100g  saturated    solute is inversely proportional to vapour pressure      x>y=z