Nalorphene (C₁₉H₂₁NO₃), similar to morphine, is used to combat withdrawal symptoms in narcotic users. The dose of nalorphene generally given is 1.5 mg.

Calculate the mass of 1.5 × 10⁻³m aqueous solution required for the above dose.
1. 13.22 g
2. 3.22 g
3. 11.22 g
4. 9.22 g

The amount of benzoic acid (C₆H₅COOH) required for preparing 250 mL of 0.15 M solution in methanol is:

The depression in the freezing point of water was observed for the same amount of acetic acid, trichloroacetic acid, and trifluoroacetic in the order of-

1. acetic acid < trichloroacetic acid < trifluoroacetic acid

2. acetic acid > trichloroacetic acid > trifluoroacetic acid

3.  acetic acid < trichloroacetic acid > trifluoroacetic acid

4. acetic acid > trichloroacetic acid < trifluoroacetic acid

The depression in the freezing point of water when 10 g of CH₃CH₂CHClCOOH is added to 250 g of water will be:

 (K_a = 1.4 × 10^–3, K_f = 1.86 K kg mol^–1)

1. 0.32 K

2. 2.87 K

3. 0.65 K

4. 5.03 K

19.5 g of CH₂FCOOH is dissolved in 500 g of water. The van’t Hoff factor and dissociation constant of fluoroacetic acid will be respectively: ($∆{\mathrm{T}}_{\mathrm{f}}$ = 1.00 K )

100 g of liquid A (molar mass 140 g mol^–1) was dissolved in 1000 g of liquid B (molar mass 180 g mol^–1). The vapour pressure of pure liquid B was found to be 500 torr. If the total vapour pressure of the solution is 475 torr, the vapour pressure of pure liquid A will be:

The major component of air is nitrogen with approximately 79% by volume at 298 K. The water is in equilibrium with air at a pressure of 10 atm. At 298 K. if the Henry’s law constant for nitrogen at 298 K is 6.51 × 10⁷ mm respectively, then the composition of nitrogen in air will be :

1. 12.4 × 10⁻⁵

2. 9.22 × 10⁻⁵

3. 3.54 × 10⁻⁵

4. 4.96 × 10⁻⁵

The amount of CaCl₂ (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27 °C is:

If 22 g of benzene is dissolved in 122 g of CCl₄, the mass percentage of CCl₄ and benzene respectively are-

1. $15.28$ $\%,$ $84.\mathrm{72<mspace\; width="1em"></mspace>}\%$ $$

2. $84.72$ $\%,$ $15.28$ $\%$

3. $8.72$ $\%,$ $91.\mathrm{28<mspace\; width="1em"></mspace>}\%$

4. 91.28 %, 8.72 %

The type of inter molecular interactions present in