Assertion: When NaCl 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.
Choose the correct answer out of the following choices.
(a)Assertion and reason both are correct statements and reason is correct explanation for assertion.
(b) Assertion is correct statement and reason is wrong statement.
(c) Assertion is wrong statement and reason is correct statement.
(d) Assertion and reason both are correct statements but reason is not correct explanation for assertion
Answers
Answered by
3
Answer:
(a) Assertion and reason both are correct statements and reason is the correct explanation for Assertion.
Answered by
1
Answer:
(A) - Assertion and Reason both are correct and reason is correct explanation for assertion
Explanation:
On addition of non-volatile solute (viz. NaCl) to water, NaCl solution is formed. Due to relatively lesser number of water molecules at the surface of liquid, the solution exerts a lower vapour pressure as compared to that of pure water. It is because of this lowering of vapour pressure that a depression in freezing point of water is observed.
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