Statement (A): When the temperature increases the viscosity of gases increases and the viscosity of liquids decreases. Statement (B): Water does not wet an oily glass because cohesive force of oil is less than that of water. Statement (C) : A liquid will wet a surface of a solid if the angle of contact is greater than 90 ° .

Step-by-step solution

Statement A: In liquid: With the rise in temperature, viscosity of a liquid decreases because the intermolecular attractive force between consecutive layers decreases as temperature increases. In gasses: The important cause of viscosity is randomness/molecular collision due to root mean square velocity. Due to rise in temperature, kinetic energy of molecules increases which makes rms velocity increase, hence randomness and collision of molecules increases. This makes the flow difficult and hence viscosity in gasses