Astronauts feel weightless in International Space Stations due to zero gravity.
False
Weightlessness is experienced either in zero gravity or in free fall. At International space station acceleration due to gravity is not zero. We experience weight when our weight is balanced by a normal force.
In case of International space station, all the things are falling at the same rate irrespective of mass. The normal force does not comes into play giving the feeling of being weightless.