Distilled water and drinking water both are comparatively pure/good water without high impurities. So this phenomenon is not applicable here, in freezing. Plain water freezes at 32 degrees F, but when sugar, or salt, or other solutes are dissolved in it, the freezing point gets lower.

No, tap water will freeze slower than distilled water as tap water contains impurities as salts and minerals which lowers the freezing point of water.

Yes, distilled water can be frozen. It will not take more time in comparison to water that we drink. In chemistry, depression of freezing point is well discussed and the freezing point can be lowered if impurities are present in the freezing medium.

We’ve all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 273.15 Kelvin. That’s not always the case, though. Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab.

Because distilled water is just water without sediment, it freezes at the same temperature: 0 degrees C. The amount of time it takes for the water to freeze depends on the temperature of the freezer, temperature of the water and amount of water in the container.

The book said that materials that trap air like polystyrene and wool are good insulators. Metals like aluminum are good at conducting heat. A thermos is good at keeping things cold because it cuts down on the passage of heat in all possible ways.

As regards to its insulation properties, cardboard is actually a great insulator as it has poor thermal conductivity. The porous composition of cardboard is the reason that makes it an excellent sound-proof material.