Question

The crystals of sodium chloride produces a crackling sound on heating, called ______.

Answer 1

Decrepitation:

• Decrepitation is the sound made when bigger sodium chloride ($\mathrm{NaCl}$) crystals split up into smaller ones.
• The water evaporates when the crystals are heated, causing the salt crystals to crack as it departs.
• Decrepitation is one of the most accurate ways of determining a mineral-deposit size, enabling more advanced and enhanced hydrothermal system study.
• When a crystal or salt degrades, the liquid pressure is released, which might result in a fracture.
• Decrepitation refers to the cracking or breaking apart of lumps of limestone during heating.
• Another example of this type of reaction is lead nitrate.
• When heated, it generates a crackling noise and emits two gases, ${\mathrm{NO}}_2$ and ${\mathrm{NO}}_3$.

$\underset{\mathrm{Lead}\mathrm{Nitrate}}{\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{s}\right)}\to \underset{\mathrm{Lead}\mathrm{Oxide}}{\mathrm{PbO}\left(\mathrm{s}\right)}+\underset{\mathrm{Nitrogen}\mathrm{Dioxide}}{{\mathrm{NO}}_2\left(\mathrm{g}\right)\uparrow }+\underset{\mathrm{Nitrogen}\mathrm{Trioxide}}{{\mathrm{NO}}_3\left(\mathrm{g}\right)\uparrow }$

Thus, the crystals of sodium chloride produce a crackling sound on heating, called decrepitation.