Q1: Superheated vapour behaves like

ANS:B - gas approximately

Superheated vapor behaves more like a gas approximately than like dry steam. Superheated vapor is vapor or steam that has been heated to a temperature above its saturation point at a given pressure. Unlike saturated vapor, which is in equilibrium with its liquid phase, superheated vapor does not contain any liquid droplets. Instead, it exists as a gas phase only. When vapor is superheated, it behaves similarly to a gas because it has greater energy and molecular mobility compared to saturated vapor or dry steam. It exhibits properties such as expansion, compression, and heat transfer similar to those of gases. However, it still retains some characteristics of vapor, such as the ability to condense back into liquid form under appropriate conditions. So, while superheated vapor does not behave exactly like a dry gas, it behaves more like a gas approximately rather than like dry steam.