Explanation: Boiling point elevation is a colligative property of solutions, which means it depends on the number of solute particles in a solution rather than the type of solute. When salt (sodium chloride) is added to water, it dissociates into sodium (Na⁺) and chloride (Cl⁻) ions. This increases the number of particles in the solution, which in turn raises the boiling point of the water.
The boiling point of a solution is higher than that of the pure solvent because the solute particles interfere with the solvent molecules' ability to escape into the vapor phase. The more particles present in the solution, the more interference there is, and the higher the boiling point becomes. This is why salt is added to water in Sikkim to increase the boiling point.
It is important to note that not all substances added to water will have the same effect. For example, sugar (sucrose) does not dissociate into ions in water; it remains as whole molecules. Therefore, while sugar can slightly increase the boiling point of water, it is not as effective as salt. Similarly, spices like turmeric and pepper do not significantly affect the boiling point of water; they are primarily used for flavoring and coloring.
In summary, the addition of salt to water in Sikkim is a practical application of the principle of boiling point elevation, which is a fundamental concept in the study of solutions and their properties. This concept is crucial in various fields, including chemistry, food science, and environmental science, and understanding it helps in comprehending the behavior of solutions in different contexts.