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Comprehension Type
This section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)

 
Passage
Heavy water boils at 101.42°Cand its molal elevation constant ( Kb ) is 10% higher than that of pure water. Elevation in 0.1 molal aqueous urea solution is 0.052°.
Q.
What is the molal elevation constant (in K mol-1 kg) of heavy water?
 
  • a)
     0.572
  • b)
    0.0572
  • c)
     0.692
  • d)
    0.0692
Correct answer is option 'A'. Can you explain this answer?
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Comprehension TypeThis section contains a passage describing theory, e...
For aqueous solution of urea,
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Comprehension TypeThis section contains a passage describing theory, e...
Question: What is the molal elevation constant (in K mol-1kg) of heavy water?

To find the molal elevation constant of heavy water, we need to use the given information about the boiling point elevation of heavy water and the elevation in a 0.1 molal aqueous urea solution.

The boiling point elevation (∆Tb) is given by the formula:

∆Tb = Kb * m

Where:
∆Tb is the boiling point elevation
Kb is the molal elevation constant
m is the molality of the solution

From the information given, we know that the boiling point elevation (∆Tb) of heavy water is 10% higher than that of pure water. This means that the molal elevation constant (Kb) of heavy water is also 10% higher than that of pure water.

Let's assume the molal elevation constant of pure water is Kb1, and the molal elevation constant of heavy water is Kb2.

According to the given information,
Kb2 = Kb1 + (10/100) * Kb1
Kb2 = Kb1 + 0.1 * Kb1
Kb2 = 1.1 * Kb1

Now, we are given the elevation (∆Tb) in a 0.1 molal aqueous urea solution, which is 0.052. Using the formula mentioned earlier, we can write:

0.052 = Kb2 * 0.1

Substituting the value of Kb2 from the earlier equation, we get:

0.052 = 1.1 * Kb1 * 0.1

Simplifying the equation, we find:

Kb1 = 0.052 / (1.1 * 0.1)
Kb1 = 0.052 / 0.11
Kb1 = 0.4727

Therefore, the molal elevation constant (Kb) of heavy water is approximately 0.4727 K mol-1kg.
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Comprehension TypeThis section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)Passage Heavy water boils at 101.42°Cand its molal elevation constant ( Kb ) is 10% higher than that of pure water. Elevation in 0.1 molal aqueous urea solution is 0.052°.Q.What is the molal elevation constant (in K mol-1kg) of heavy water?a)0.572b)0.0572c)0.692d)0.0692Correct answer is option 'A'. Can you explain this answer?
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Comprehension TypeThis section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)Passage Heavy water boils at 101.42°Cand its molal elevation constant ( Kb ) is 10% higher than that of pure water. Elevation in 0.1 molal aqueous urea solution is 0.052°.Q.What is the molal elevation constant (in K mol-1kg) of heavy water?a)0.572b)0.0572c)0.692d)0.0692Correct answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Comprehension TypeThis section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)Passage Heavy water boils at 101.42°Cand its molal elevation constant ( Kb ) is 10% higher than that of pure water. Elevation in 0.1 molal aqueous urea solution is 0.052°.Q.What is the molal elevation constant (in K mol-1kg) of heavy water?a)0.572b)0.0572c)0.692d)0.0692Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Comprehension TypeThis section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)Passage Heavy water boils at 101.42°Cand its molal elevation constant ( Kb ) is 10% higher than that of pure water. Elevation in 0.1 molal aqueous urea solution is 0.052°.Q.What is the molal elevation constant (in K mol-1kg) of heavy water?a)0.572b)0.0572c)0.692d)0.0692Correct answer is option 'A'. Can you explain this answer?.
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