In the Andrews isotherm, liquefaction begins at point (b) and ends at point (c), with \(CO_2\) existing as both liquid and gas between these points.
In the given Andrews isotherm:
• At point (a), \(CO_2\) exists as gas.
• At point (b), liquefaction of \(CO_2\) starts.
• Between points (b) and (c), \(CO_2\) exists as liquid and gas in equilibrium.
• At point (c), liquefaction ends, and beyond this, \(CO_2\) exists as a liquid.
Thus:
• Statement A is correct.
• Statement B is incorrect.
• Statement C is correct.
• Statement D is incorrect.
The correct statements are (A) and (C).
The matter is made up of very tiny particles and these particles are so small that we cannot see them with naked eyes.
The three states of matter are as follows: