1. To form a solution, ________.
   

one substance must dissolve in another

a solid must dissolve in a liquid

the solvent must be water

a gas must dissolve in a liquid

2.A salt is dissolved in water, which has a boiling point of 100°C. The boiling point of the solution will be ________.

greater than 100°C

less than 100°C

exactly 100°C

exactly 0°C

3.During the formation of a solution, energy is ________.

either released or absorbed

neither released nor absorbed

released only

absorbed only