Pick one material from the following which is completely soluble in water.
  1. Chalk powder
  2. Tea leaves
  3. Glucose
  4. Sawdust

AcademicChemistryNCERTClass 6

Correct answer: (c) Glucose

Explanation: Glucose is completely soluble in water. Chalk Powder, tea leaves, and sawdust are insoluble in water and settle down at the bottom of the container.

[Extra information: Solubility is the maximum concentration of solute that dissolves in a known concentration of solvent at a given temperature. Based on the concentration of solute dissolves in a solvent, solutes are categorized into highly soluble, sparingly soluble, or insoluble. 

The maximum amount of solute that can be dissolved in 100 g of a solvent at a specified temperature is known as the solubility of that solute in that solvent. The solubility of solids in liquids is directly proportional to temperature whereas the solubility of gases in liquids is inversely proportional to temperature. The solubility of solids in liquids is directly proportional to temperature, hence, it increases on increasing the temperature and decreases on decreasing the temperature.]

Updated on 10-Oct-2022 13:19:56