If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the boiling point of the solution is ____________ molal. (Rounded off to the nearest integer)

[K_b = 0.52 K kg mol^$$-$$1]

1 molal aqueous solution of an electrolyte A₂B₃ is 60% ionised. The boiling point of the solution at 1 atm is _________ K. (Rounded off to the nearest integer)

[Given K_b for (H₂O) = 0.52 K kg mol^$$-$$1]

C₆H₆ freezes at 5.5$$^\circ$$C. The temperature at which a solution of 10g of C₄H₁₀ in 200g of C₆H₆ freeze is __________ $$^\circ$$C. (The molal freezing point depression constant of C₆H₆ is 5.12$$^\circ$$C/m.)

When 9.45 g of CICH₂COOH is added to 500 mL of water, its freezing point drops by 0.5°C. The dissociation constant of CICH₂COOH is x $$ \times $$ 10^-3.
The value of x is ________. (Rounded off to the nearest integer)
[K_f(H20) = 1.86 K kg mol^-1]