At what temperature does pure water freeze at standard atmospheric pressure?

Explanation

Pure water freezes at 0 degrees Celsius (32 F) under standard atmospheric pressure. Interestingly, water is densest at about 4 degrees Celsius, which is why ice floats on top of liquid water rather than sinking. This freezing point can shift slightly with the addition of salt or other impurities, which is why salt is used to melt ice on roads. Explore more Everyday Science MCQs on mcqstutor to keep practicing.