Which one of the following statements is correct with reference to th…

The correct answer is Option (1) → The solubility of gases in liquids increases with the increase of pressure.

• The solubility of gases in liquids follows Henry’s Law, which states that:
• At constant temperature, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid.
• Mathematically: p = KH × x
• Where p = partial pressure of the gas
• x = mole fraction of the gas in the solution
• KH = Henry’s law constant
• Thus, when pressure increases, more gas dissolves in the liquid, increasing solubility.
• Temperature also affects solubility. Generally, solubility of gases decreases with increase in temperature because gases escape from solution when heated.

Option 1 The solubility of gases in liquids increases with the increase of pressure. Correct.

According to Henry’s law, solubility increases with increasing pressure.

Option 2 The solubility of gases in liquids is not affected with the increase of temperature. Incorrect. Temperature significantly affects gas solubility.

Option 3 The solubility of gases in liquids increases with the increase of temperature. Incorrect.

In most cases, gas solubility decreases when temperature increases.

Option 4 At high altitude, the partial vapour pressure of O₂ becomes greater than that at the sea level. Incorrect.

At high altitude, atmospheric pressure is lower, so the partial pressure of oxygen is also lower.