If a soap bubble expands, the pressure inside the bubble

When an empty bottle is closed air tight and pushed inside water it bounces back when it is released. This is because _______.

A barometer is constructed using a liquid (density =760kg/m³). What would be the height of the liquid column, when a mercury barometer reads 76cm ?
(Density of mercury =13600kg/m³)

A liquid does not wet the solid surface if angle of contact is