Solutions Test ...

Which of the following pairs do not form ideal solution

The vapour pressure of water at T(K) is 20 mm Hg. The following solutions are prepared at T(K) :

If $${X_A}$$ and $${X_B}$$ represent mole fraction in liquid phase while $${y_A}$$ and $${y_B}$$ represent mole fraction in vapour phase in binary solution. Which of the following statements is/are correct?

The volume of 0.0168 mol of $${ O }_{ 2 }$$ obtained by decomposition of $${ KCIO }_{ 3 }$$ and collected by displacement of water is 428ml at a pressure of 754 mm Hg at $${ 25 }^{ 0 }C.$$ The pressure of water vapour at $${ 25 }^{ 0 }C$$ is:

Colligative properties of a dilute solution depend on

Van't Hoff factor for molar aqueous solution of A, B and C are 1.4, 0.6 and 2.3. Which is correct for above solutions
?

Two liquids A & B form an ideal solution. What is the vapour pressure of solution containing 2 moles of A and 3 moles of B at 300 K? [Given: At 300 K, Vapour pr. of pure liquid A $$\left( P\begin{matrix} 0 \\ A \end{matrix} \right) $$=100 torr, Vapour pr. of pure liquid B $$\left( P\begin{matrix} 0 \\ B \end{matrix} \right) $$=300 torr]

Molar volume of liquid A (d=0.8 gm/ml) increase by a factor of 2000 when it vapourises at 2000K. The vapour pressure of liquid A at 200K is:

In the accompanied diagram, the ideal behaviour of a solution is shown by the line/s

Observe the following abbreviations, $$\pi _{obs}=$$  observed colligative property,  $$\pi_{cal} = $$ theoretical colligative property, assuming normal behaviour of solute. Van't Haff factor (i) is given by: