To minimise the painful effects accompanying deep sea diving, oxygen diluted with less soluble helium gas is used as breathing gas by the divers. This is an example of the application of - 

The graph representing Henry's law is given below:

The value of the slope will be

Henry’s law constant for the solution of methane in benzene at 298 K is 4.27 × 10⁵ mm Hg. The mole fraction of methane in benzene at 298 K under 760 mm Hg will be:

1. 1.85 × 10^–5

2. 192 × 10^–4

3. 178 × 10^–5

4. 18.7 × 10^–5

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

A 500 g toothpaste sample has 0.4 g fluoride concentration. The fluoride concentration in terms of ppm will be -

The partial pressure of ethane over a solution containing 6.56 × 10^–2 g of ethane is 1 bar. If the solution contains 5.00 × 10^–2 g of ethane, the partial pressure of the gas will be -

1. 0.66 bar

2. 0.96 bar

3. 0.76 bar

4. 0.19 bar

A solution of glucose (M.W= 180 g mol^-1) in water is 10 % w/w. The mole fraction of each component in the solution is:

The solubility of H₂S in water at STP is 0.195 m. The value of Henry's constant is-