Which type of liquid freezes the fastest?

Answer 1

Freezes the fastest can be of 2 mean.

For liquid to reach the freezing point first, the liquid with higher molecular mass or stronger intermolecular force would have higher freezing point and can be considered freezing faster. But it might took quite a while to freeze at the freezing point.

For liquid to become solid with the least energy transfer required. The liquid with the lowest intermolecular force would change the state faster at freezing point. But the freezing point might be extremely low.

Answer 2

Pure water freezes the fastest due to its high heat capacity and lack of impurities compared to other liquids. Impurities such as salts or sugars can lower the freezing point and slow down the freezing process.