NEET · Chemistry · STD 12 -1. Solution and colligative properties
Which of the following aqueous solution will exhibit highest boiling point?
- A 0.01 M Urea
- B \(0.01 \text{ M KNO} _3\)
- C \(0.01\text{ M Na} _2\text{SO} _4\)
- D \(0.015\text{ M C} _6 \text{H} _{12} \text{O} _6\)
Answer & Solution
Correct Answer
(C) \(0.01\text{ M Na} _2\text{SO} _4\)
Step-by-step Solution
Detailed explanation
\(\Delta T _{ b }= i K _{ b } m\)
- Consider \(m \approx M\)
- \(K _{ b }\) same for all \(i \times M\)
(1) \(1 \times 0.01=0.01\)
(2) \(2 \times 0.01=0.02\)
(3) \(3 \times 0.01=0.03\)
(4) \(1 \times 0.015=0.015\)
\(iM \uparrow \Rightarrow \Delta T _{ b } \uparrow \Rightarrow T _{ b } \uparrow\)
- Consider \(m \approx M\)
- \(K _{ b }\) same for all \(i \times M\)
(1) \(1 \times 0.01=0.01\)
(2) \(2 \times 0.01=0.02\)
(3) \(3 \times 0.01=0.03\)
(4) \(1 \times 0.015=0.015\)
\(iM \uparrow \Rightarrow \Delta T _{ b } \uparrow \Rightarrow T _{ b } \uparrow\)
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