If a centimolal aqueous solution of K$$_3$$[Fe(CN)$$_6$$] has degree of dissociation 0.78. What is the value of van't Hoff factor?

The elevation in boiling point of 0.25 molal aqueous solution of a substance is $\left(K_o=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$

Which among the following salts, solubility decreases with increase in temperature?

18 gram glucose (Molar mass $=180$ ) is dissolved in 100 ml of water at 300 K . If $R=3$ $0.0821 \mathrm{~L}{-\mathrm{a t m}} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$ what is the osmotic pressure of solution?