Question

According to Boyle’s law, the product of pressure and volume is a constant. Hence
A. If volume of lungs is increased, the pressure decreases proportionally.
B. If volume of lungs is increased, the pressure also increases proportionately.
C. If volume of lungs is increased, the pressure decreases disproportionality.
D. If volume of lungs is increased, the pressure remains the same.

Answer 1

Hint: In humans, lungs are a pair of spongy and air-filled organs which are located on the either side of the thorax. They are the main organ involved in the process of respiration.

Complete answer:
Robert Boyle established the relationship between the pressure p and volume V of an ideal gas at constant temperature. He stated that the product of the pressure and volume of an ideal gas remains constant.
P$\times$V = constant

Option A: When the volume of lungs is increased, a proportional increase in the pressure of the lungs is observed based on the inversely proportional relationship between the volume and pressure of the lungs. Therefore, this is the correct option.

Option B: Pressure of lungs don’t increase with the increase in the volume of lungs. Therefore, this is the incorrect option.

Option C: When the volume of lung is increased it is not associated with the disproportionate decrease of the lung pressure due to the inverse relation between the lung pressure and volume. Therefore, this is the incorrect option.

Option D: Volume and pressure are inversely proportional to each other. So, when the volume of lungs is increased the pressure cannot remain the same.Therefore, this is the incorrect option.

Thus, the correct option is A) If volume of lungs is increased, the pressure decreases proportionally.

Note: When the volume is halved, the pressure is doubled and when the volume is doubled, pressure is halved. Pressure is decreased when volume increases and vice versa when the temperature is kept constant.