If you put papaya juice in a freezer for 3 hours, it will likely start to freeze and become partially solid. The exact consistency will depend on the sugar and water content of the juice.
During the freezing process, the water molecules in the juice will begin to form ice crystals. These ice crystals can affect the texture and taste of the juice. When you take it out of the freezer and thaw it, the juice may have a slushy consistency with some ice crystals present.
It's important to note that freezing and thawing can affect the overall quality of the juice. The texture might become slightly grainy, and the taste might be altered to some extent. Freezing can also lead to some separation of the juice components, resulting in a change in texture when it thaws.
If you plan to freeze papaya juice, it's a good idea to transfer it to an airtight container or freezer-safe bag to minimize exposure to air, which can cause freezer burn and affect the flavor. Also, keep in mind that freezing can cause expansion, so leave some space in the container to allow for this.