The color remain unchanged for pure sodium chloride.
Sodium chloride can be melted or boiled but not sublime.
Sodium chloride is melted by heating at 801 0C.
Crystals of pure sodium chloride are colorless.
No; by heating solid sodium chloride may be transformed in a liquid or a gas.
The yellow color of the flame is due only to sodium.
Sodium chloride is separated by dissolving in water.Wax is released by heating.
If you think to color pure sodium chloride crystals are transparent.
Sodium chloride solution is neutral.
The thermal dissociation reaction of ammonium chloride is:NH4Cl-------------------------NH3 + HClAmmonium chloride doesn't react with sodium chloride.
As sodium chloride is heated, the vibrations of the individual sodium chloride molecules increase, forcing adjacent sodium chloride molecules to move away until they have enough room to vibrate. Once the temperature increases to 801 °C (1,474 °F), the molecules are so far apart that they can't hold together anymore. So, they fall apart and act as a liquid. Viola, molten sodium chloride.
It is not necessary to be especially careful when heating sodium chloride.
Sublimation - on gentle heating ammonium chloride will sublime. Sodium Chloride does not and has a high melting point.