12. A mixture of water and alcohol can be separated by
13. The absolute zero, i.e. temperature below which is not achievable, is about
14. A student by chance mixed acetone with alcohol. The mixture of acetone and alcohol can be separated by
15. Why do two ice blocks join to form one block when pressed together?
16. The proposition 'equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure' is known as
17. Unit of viscosity is
18. In general equation pV = nRT, V is the volume of
19. Assertion (A) All molecules of an ideal gas move with the same speed.
Reason (R) There is no attraction between the molecules is in ideal gas.
Reason (R) There is no attraction between the molecules is in ideal gas.