TS EAMCET 10-Sep-2020 Shift 1 Solved Paper

(i), (ii), (iii)
All gases are made up of a very large number of extremely small particles called molecules. All the molecules of a particular gas are identical in mass and size. The molecules are separated from one another by large space. Hence, the actual volume occupied by the molecules is negligible as compared to the total volume of the gas.
The collisions of gas particles with one another and with the walls of the container are perfectly elastic.