Nalorphene (C₁₉H₂₁NO₃), similar to morphine, is used to combat withdrawal symptoms in narcotic users. Dose to nalorphene generally given is 1.5 mg. Calculate the mass of 1.5 X 10⁻³ m aqueous solution required for the above dose is?

One molal solution of a carboxylic acid in benzene shows the elevation of boiling point of 1.518 K. The degree of association for dimerisation of the acid in benzene is 

(Kb for benzene = 2.53 K kgmol^-1)

The relationship between osmotic pressure at 273K, when 10gm glucose(P₁), 10 gm urea (P₂) and 10 gm sucrose (P₃) dissolved in 250 ml of water is-

If 'A' contains 2% NaCl and is separated by a semi permeable membrane from 'B', which contains 10% NaCl, then the event will occur is-

The vapour pressure of water depends upon:

The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows

A 5.85% solution of NaCl has osmotic pressure close to-

The mole(s) of K₂SO₄ to be dissolved in 12 moles water to lower its vapor pressure by 10 mm of Hg at a temperature at which vapor pressure of pure water is 50 mm of Hg is-

The salt that possesses the highest freezing point is-

Aluminium phosphate is 100% ionized in 0.01m aqueous solution. Hence, $∆{\mathrm{T}}_{\mathrm{b}}/{\mathrm{k}}_{\mathrm{b}}$ is-

Which solution has highest freezing point?

Osmotic pressure of 40% (w/V) urea solution is 1.64 atm. and that of 3.42% (w/V) cane sugar solution is 2.46 atm. When equal volumes of the above two solutions are mixed, the osmotic pressure of the resulting solution will be?  

20g of naphthoic acid (C₁₁H₈O₂) dissolved in 50g of benzene (K_f=1.72 K Kg mol^-1) shows a depression in freezing point of 2K. The Vant Hoff factor is?

A 0.002 molar solution of NaCl having degree of dissociation of 90% at 27⁰C, has osmotic pressure equal to:-

The density of NH₄OH solution is found to be 0.6 g/ml. It contains 35% by mass of NH₄OH. The normality of the solution is

The relative lowering of vapour caused by dissolving 71.3g of a substance in 1000g of water is 7.13x10^-3. The molecular mass of substance is-

Total vapour pressure of a mixture of 1 mol A ($p_{\mathrm{A}}^{°}$ = 150 torr) and 2 mol B (${\mathrm{p}}_{\mathrm{B}}^{°}$ = 240 torr) is 200 torr. In this case:-

Which of the following aqueous solution should have the highest osmotic pressure?

50 g of antifreeze (ethylene glycol) is added to 200g water. What amount of ice will separate out at -9.3°C. (K_f = 1.86 K Kg mol^-1) :-

40 g NaOH (i=2) is dissolved in 1L volatile solvent vapour pressure  of this solution becomes equal to its solid phase at 300K. What is the freezing point of pure solvent.

(Density = 1g/mL) (K_f=1.8 k kgmol^-1)

At 100°C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If K_b = 0.52, the boiling point of this solution will be

P₁ and P₂ are vapour pressure of solvent and solution at temperature T. The solution is prepared by dissolving non-volatile solute in the same solvent. P₁ =760 torr, P₂ =684 mm Hg, Mole fraction of solvent in the solution will be:-

100 g solute is dissolved in 1400 g of solvent. Density of resultant solution is 1.5 g/mL. The ratio of its molarity and molality will be :-

As scuba divers come towards water surface from underwater, solubility of gases in their blood :-

Solution A & B are formed by dissolving a certain amount of glucose and sucrose in water. The Vapour pressure of these solutions is 660 and 560 mm Hg respectively at 100^oC. The ratio of molality of solutions A & B will be:-

$$\begin{gathered} 1. \frac{14}{33} \\ 2. \frac{33}{14} \\ 3. \frac{15}{35} \\ 4. \frac{35}{15} \end{gathered}$$

Saturated solution of Ag₂SO₄ shows 0.003K rise in boiling point, K_sp will be :(K_b = 5 K kg mol^-1)(1m=1M)

When 36 g of a solute having the empirical formula CH₂O is dissolved in 1.2 kg of water, the solution freezes at -0.93°C. What is the molecular formula of solute (K_f = 1.86 kg K mol^-1)

6g urea is dissolved in 1kg solvent. Value of (T₁-T₂) will be : (K_f=2 kg K mol^-1)

A solution containing 0.03659 g/ml of HCl and a solution containing 0.04509 g/ml of acetic acid Then:

The lubricating action of an oil is more if it possess:-