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Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.
Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot water
  • a)
    Both (A) and (R) are true, and (R) is the correct explanation of (A).
  • b)
    Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  • c)
    (A) is true, but (R) is false.
  • d)
    (A) is false, but (R) is true.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Direction: In the following questions, a statement of Assertion (A) i...
Benzoic acid is soluble in hot water but naphthalene is not soluble, hence separation can be carried out by hot water crystallisation.
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Direction: In the following questions, a statement of Assertion (A) i...
Assertion: A mixture of benzoic acid and naphthalene can be separated by crystallization from water.
Reason: Benzoic acid is soluble in hot water but naphthalene is insoluble in hot water.

Explanation:
The given assertion and reason state that a mixture of benzoic acid and naphthalene can be separated by crystallization from water because benzoic acid is soluble in hot water while naphthalene is insoluble in hot water.

Crystallization:
Crystallization is a separation technique that is used to separate a solid from a liquid. It is based on the principle that a solute will dissolve in a solvent at high temperatures but will crystallize out of the solution when the temperature is lowered.

Benzoic Acid and Naphthalene:
Benzoic acid is a solid organic compound that is soluble in hot water. It forms a clear solution when dissolved in hot water, but upon cooling, it crystallizes out of the solution.

On the other hand, naphthalene is also a solid organic compound but it is insoluble in hot water. It does not dissolve in hot water and remains as a separate solid phase.

Separation by Crystallization:
Based on the solubility properties of benzoic acid and naphthalene, the mixture can be separated by the process of crystallization. Here's how it can be done:

1. Dissolve the mixture of benzoic acid and naphthalene in hot water. The benzoic acid will dissolve in the hot water, forming a clear solution, while the naphthalene will remain as a solid phase.

2. Allow the solution to cool down slowly. As the temperature decreases, the solubility of benzoic acid in water decreases. Eventually, the benzoic acid will crystallize out of the solution.

3. Separate the benzoic acid crystals from the remaining liquid by filtration or decantation.

4. The remaining liquid will contain the insoluble naphthalene, which can be further separated by techniques such as filtration or centrifugation.

Conclusion:
The given assertion and reason are both true. Benzoic acid is soluble in hot water, while naphthalene is insoluble in hot water. This difference in solubility allows the mixture of benzoic acid and naphthalene to be separated by the process of crystallization from water. Therefore, option A is the correct answer.
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Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer?
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Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Direction: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:Assertion : A mixture of benzoic acid and naphthalene can be separated by crystallization from water.Reason : Benzoic acid is soluble in hot water but naphthalene is insoluble in hot watera)Both (A) and (R) are true, and (R) is the correct explanation of (A).b)Both (A) and (R) are true, but (R) is not the correct explanation of (A).c)(A) is true, but (R) is false.d)(A) is false, but (R) is true.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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