Solutions

An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the beaker of water, the rate at which water molecules:

The INCORRECT statement is:

Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non-volatile solute are together sealed in a container. Over time

At ${}^{}$ ${35}^{?}\mathrm{C}$ , the vapour pressure of ${\mathrm{C}\mathrm{S}}_2$ ${}_{}$ is $$ $512\mathrm{m}\mathrm{m}$ of $\mathrm{H}\mathrm{g}$ $$ and that of acetone is $344\mathrm{m}\mathrm{m}$ $$ of $\mathrm{H}\mathrm{g}$ $$ . A solution of ${\mathrm{C}\mathrm{S}}_2$ ${}_{}$ in acetone has a total vapour pressure of $600\mathrm{m}\mathrm{m}$ $$ of $\mathrm{H}\mathrm{g}$ $$ . The false statement among the following is

The density of NaOH solution is 1.2 gm cm⁻³. The molality of this solution is _______ m. (Round off to the Nearest integer) [Use: Atomic masses: Na 23.0u O: 16.0 u H:1.0 u Density of H₂O: 1.0g cm⁻³]

1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 * 10⁻³ bar. The molar mass of the biopolymer is _______ * 10⁴ g mol⁻¹. (Round off to the Nearest integer) [Use: R = 0.083 L bar mol⁻¹ K⁻¹]

When 3.00 g of substance 'X" is dissolved in 100 g of CCl₄, it raises the boiling point by 0.60K. The molar mass of the substance 'X" is __________g mol⁻¹. (nearest integer)
[Given Kb for CCl₄ is 5.0 K kg mol⁻¹]

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

Which one of the following  0.06M aqueous solutions has lowest freezing point?

At 20°C the vapour pressure of benzene is 70 torr and that of methyl benzene is 20 torr. The mole fraction of benzene in the vapour phase at 20°C above an equimolar mixture of benzene and methyl benzene is__________ * 10^-2. (Nearest integer)