319326 Vapour pressure of chloroform \(\left(\mathrm{CHCl}_{3}\right)\) and dichloromethane \(\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)\) at \(25^{\circ} \mathrm{C}\) are200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of \({\text{CHC}}{{\text{l}}_{\text{3}}}\) and 40 g of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) at the same temperature will be : (Molecular mass of \({\rm{CHC}}{{\rm{l}}_{\rm{3}}}\) = 119.5 u and molecular mass of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) = 85 u).

319327 The mass of a non-volatile solute of molar mass \({\rm{40g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is

319328 The mass of a non-volatile, non-electrolyte solute \(\left( {{\rm{molar}}{\mkern 1mu} {\mkern 1mu} {\rm{mass = 50g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) needed to be dissolved in 114 g octane to reduce its vapour pressure to 75%, is:

319329 The vapour pressure lowering caused by the addition of \(100 \mathrm{~g}\) of sucrose (molecular mass \(=342\)) to \(1000 \mathrm{~g}\) of water, if the vapour pressure of water at \(25^{\circ} \mathrm{C}\) is \(23.8 \mathrm{~mm} \,\mathrm{Hg}\) is

319326 Vapour pressure of chloroform \(\left(\mathrm{CHCl}_{3}\right)\) and dichloromethane \(\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)\) at \(25^{\circ} \mathrm{C}\) are200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of \({\text{CHC}}{{\text{l}}_{\text{3}}}\) and 40 g of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) at the same temperature will be : (Molecular mass of \({\rm{CHC}}{{\rm{l}}_{\rm{3}}}\) = 119.5 u and molecular mass of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) = 85 u).

319327 The mass of a non-volatile solute of molar mass \({\rm{40g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is

319328 The mass of a non-volatile, non-electrolyte solute \(\left( {{\rm{molar}}{\mkern 1mu} {\mkern 1mu} {\rm{mass = 50g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) needed to be dissolved in 114 g octane to reduce its vapour pressure to 75%, is:

319329 The vapour pressure lowering caused by the addition of \(100 \mathrm{~g}\) of sucrose (molecular mass \(=342\)) to \(1000 \mathrm{~g}\) of water, if the vapour pressure of water at \(25^{\circ} \mathrm{C}\) is \(23.8 \mathrm{~mm} \,\mathrm{Hg}\) is

319326 Vapour pressure of chloroform \(\left(\mathrm{CHCl}_{3}\right)\) and dichloromethane \(\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)\) at \(25^{\circ} \mathrm{C}\) are200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of \({\text{CHC}}{{\text{l}}_{\text{3}}}\) and 40 g of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) at the same temperature will be : (Molecular mass of \({\rm{CHC}}{{\rm{l}}_{\rm{3}}}\) = 119.5 u and molecular mass of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) = 85 u).

319327 The mass of a non-volatile solute of molar mass \({\rm{40g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is

319328 The mass of a non-volatile, non-electrolyte solute \(\left( {{\rm{molar}}{\mkern 1mu} {\mkern 1mu} {\rm{mass = 50g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) needed to be dissolved in 114 g octane to reduce its vapour pressure to 75%, is:

319329 The vapour pressure lowering caused by the addition of \(100 \mathrm{~g}\) of sucrose (molecular mass \(=342\)) to \(1000 \mathrm{~g}\) of water, if the vapour pressure of water at \(25^{\circ} \mathrm{C}\) is \(23.8 \mathrm{~mm} \,\mathrm{Hg}\) is

319326 Vapour pressure of chloroform \(\left(\mathrm{CHCl}_{3}\right)\) and dichloromethane \(\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)\) at \(25^{\circ} \mathrm{C}\) are200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of \({\text{CHC}}{{\text{l}}_{\text{3}}}\) and 40 g of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) at the same temperature will be : (Molecular mass of \({\rm{CHC}}{{\rm{l}}_{\rm{3}}}\) = 119.5 u and molecular mass of \({\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{2}}}\) = 85 u).

319327 The mass of a non-volatile solute of molar mass \({\rm{40g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is

319328 The mass of a non-volatile, non-electrolyte solute \(\left( {{\rm{molar}}{\mkern 1mu} {\mkern 1mu} {\rm{mass = 50g}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\) needed to be dissolved in 114 g octane to reduce its vapour pressure to 75%, is:

319329 The vapour pressure lowering caused by the addition of \(100 \mathrm{~g}\) of sucrose (molecular mass \(=342\)) to \(1000 \mathrm{~g}\) of water, if the vapour pressure of water at \(25^{\circ} \mathrm{C}\) is \(23.8 \mathrm{~mm} \,\mathrm{Hg}\) is