The depression of freezing point of molal aqueous solution of is less than that of molal aqueous…
Assertion: The depression of freezing point of $0\cdot1$ molal aqueous solution of $\text{MgCl}_2$ is less than that of $0\cdot1$ molal aqueous solution of $\text{NaCl}$.
Reason: The number of particles furnished by $0\cdot1$ molal $\text{MgCl}_2$ is less than that of $0\cdot1$ molal $\text{NaCl}$.
Given below are two statements marked Assertion and Reason. Read the two statements carefully and select the correct option.
- (a)Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
- (b)Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
- (c)Assertion is true and Reason is false.
- (d)Both Assertion and Reason are false.
Answer
Answer
AIWritten by AI (gemini) - it can contain mistakes.
Correct option: (d)
The Assertion is false because $\text{MgCl}_2$ dissociates into 3 ions ($i = 3$) while $\text{NaCl}$ dissociates into 2 ions ($i = 2$), so $\Delta T_f$ is greater for $0\cdot1\text{ m } \text{MgCl}_2$. The Reason is false because $0\cdot1\text{ m } \text{MgCl}_2$ furnishes more particles than $0\cdot1\text{ m } \text{NaCl}$.
Answer: (d) Both Assertion and Reason are false.
From ISC 2026 Chemistry Paper 1, question 1(B)(vii).