Question

Ritesh suggested adding salt to the box containing ice. He said this would keep the cold drink bottles cold for a longer time. How will Ritesh justify his suggestion?

Answer 1

Ritesh is correct because adding salt to ice lowers the freezing point of water (freezing point depression). As a result, the ice-salt mixture becomes colder than 0°C and melts more slowly. This lower temperature keeps the cold drink bottles cool for a longer time.