Question

answer it please it's urgent​

Answer 1

Solubility

The knowledge of solubility can be employed to detect the malpractice of the vendor.$\:$

Answer 2

Answer:

When the mixture of white powdered salt and white powdered stone is dissolved in water, the salt will get dissolved in water while the stone will remain undissolved. And thus the knowledge of solubility can be employed to detect the malpractice of the vendor.