A drinking water sample was found to be contaminated with chloroform at a level of 15 ppm (by mass). What is the mass percent of chloroform in the sample?

1. $15\times {10}^{-4}$

2. $1.5\times {10}^{-4}$

3. $0.15\times {10}^{-4}$

4. $15\times {10}^{-5}$

The type of molecular interactions in a solution of alcohol and water is:

The graph representing Henry's law is given below:

The value of the slope will be:

Points A and B in the below-mentioned graph represent, respectively:

The law depicted by the provided graph is:

Which graph represents the positive deviation of vapor pressure?

1.		2.
3.		4.	None of the above

Which graph represents the elevation in boiling point?

1.
2.
3.
4.	None of the above.

The following solutions were prepared by dissolving 10 g of glucose (C₆H₁₂O₆) in 250 ml of water (P₁), 10 g of urea (CH₄N₂O) in 250 ml of water (P₂) and 10 g of sucrose (C₁₂H₂₂O₁₁) in 250 ml of water (P₃). The decreasing order of osmotic pressures of these solutions is:

The correct option for the value of vapour pressure of a solution at 45 $°$C with benzene to octane in a molar ratio 3:2 is:

[At 45 $°$C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]
1. 336 mm of Hg
2. 350 mm of Hg
3. 160 mm of Hg
4. 168 mm of Hg

An antifreeze solution is prepared from 222.6 g of ethylene glycol (C₂H₆O₂) and 200 g of water. The molality of the solution would be: