| Direction (1 - 5): Read the following passage and answer the questions that follow. |
| The addition of non-volatile substances to a solvent decreases the vapour pressure and added solute particles affects the formation of pure solvent crystals. Decrease in freezing point is directly correlated to the concentration of solutes dissolved in the solvent. A soluble solid in solution has the effect of raising its boiling point. |
| (Reference: Jayawardena J, Vanniarachchi M, Wansapala M (2017). Freezing point depression of different sucrose solutions and coconut water. Journal of Food Science and Nutrition. 2. 68-71) |
| Assertion: When NaCI is added to water, a depression in freezing point is observed. |
| Reason: The lowering of vapour pressure of a solution causes depression in the freezing point |
A) Assertion and reason both are correct statements and reason is the correct explanation for assertion.
B) Assertion and reason both are correct but reason is not the correct explanation for assertion.
C) Assertion is correct but reason is wrong.
D) Assertion is wrong but reason is correct.
Correct Answer: A
Solution :
Reason is the correct explanation of assertion.
You need to login to perform this action.
You will be redirected in
3 sec
