Solutions Quiz-2

For an ideal solution with $p^0_A >p_B^0$ Which of the following is true?

The millimoles of $N_2$ gas that will dissolve in 1L of water of 298K when it is bubbled through water and has a partial pressure of 0.96 bar. $K_H=76.8\,k\,bar)$

If two substances A and B have $p_A^0 : p_B^0 = 1:2$ and have mole fraction in solution 1:2, then A B mole fraction of A in vapour is

The mass of solute (molar mass $60 \text{ g mol}^{-1}$ ) that must be added to 180g of water so that the vapour pressure of water is lowered by 10% is

A solution has 1:4 mole ratio of pentane to hexane. Vapour pressures of pure hydrocarbons 0 at $20^\circ C$ are 440 mm Hg for pentane and 120 mm Hg for hexane. Mole fraction of pentane in the vapour phase is

The elevation in boiling point, when 13.44g of freshly prepared $CuCl_2$ are added to one kilogram of water, is ($K = 0.52\text{ kg K mol}^{-1}$, molar mass of $CuCl_2=134.4\text{ g mol}^{-1}$)

An azeotropic solution of two liquids has boiling point lower than either of them when it

An aqueous solution containing 1g of urea boils at $100.25^\circ C$. The aqueous solution containing 3g of glucose in the same volume will boil at

An aqueous solution of glucose boils at $100.01^\circ C$. The molal elevation constant of water is $0.5\text{ K kg mol }^{-1}$. The number of glucose molecules in the solution containing 100g of water is

The mass of glucose that should be dissolved in 50g of water in order to produce the same lowering of vapour pressure as produced by dissolving 1g of urea in the same quantity of water is