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Given below are two statements:
I. In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl+ZnCl2, known as Lucas Reagent.
II.Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.
In the light of the above statements, choose the most appropriate answer from the options given below:
  • a)
    I is incorrect but II is correct
  • b)
    Both I and II correct
  • c)
    Both I and II are incorrect
  • d)
    I is correct but II is incorrect
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Given below are two statements:I. In Lucas test, primary, secondary a...
Explanation of the Statements
The question presents two statements regarding the Lucas test, which is a qualitative test used to distinguish between primary, secondary, and tertiary alcohols based on their reactivity with Lucas reagent (conc. HCl + ZnCl2).
Statement I: Analysis
- The first statement is correct in asserting that the Lucas test differentiates alcohols based on their reactivity.
- However, it lacks clarity regarding the reactivity pattern. Specifically, it is tertiary alcohols that react the fastest, followed by secondary, and then primary alcohols.
Statement II: Analysis
- The second statement is incorrect. It claims that primary alcohols are the most reactive and produce turbidity immediately at room temperature.
- In reality, tertiary alcohols are the most reactive with Lucas reagent and will give turbidity almost immediately, while primary alcohols react very slowly, often requiring heat to show any turbidity.
Conclusion
Given this analysis:
- Statement I is correct in its description of the test's purpose.
- Statement II is incorrect because it misrepresents the reactivity order of alcohols.
Thus, the correct answer is option 'D': "I is correct but II is incorrect."
This understanding of the Lucas test is crucial for identifying the type of alcohols in organic chemistry, especially for NEET aspirants.
Free Test
Community Answer
Given below are two statements:I. In Lucas test, primary, secondary a...
In the Lucas test, primary, secondary, and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl+ZnCl2, known as Lucas Reagent.
Tertiary alcohol gives immediate white turbidity with Lucas reagent, secondary alcohol gives white turbidity in 5 minutes, and primary alcohol does not react with Lucas reagent at room temperature.
The general reaction is as follows:
Hence, Statement I is correct but statement II is incorrect.
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Given below are two statements:I. In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl+ZnCl2, known as Lucas Reagent.II.Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.In the light of the above statements, choose the most appropriate answer from the options given below:a)I is incorrect but II is correctb)Both I and II correctc)Both I and II are incorrectd)I is correct but II is incorrectCorrect answer is option 'D'. Can you explain this answer?
Question Description
Given below are two statements:I. In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl+ZnCl2, known as Lucas Reagent.II.Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.In the light of the above statements, choose the most appropriate answer from the options given below:a)I is incorrect but II is correctb)Both I and II correctc)Both I and II are incorrectd)I is correct but II is incorrectCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Given below are two statements:I. In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl+ZnCl2, known as Lucas Reagent.II.Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.In the light of the above statements, choose the most appropriate answer from the options given below:a)I is incorrect but II is correctb)Both I and II correctc)Both I and II are incorrectd)I is correct but II is incorrectCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Given below are two statements:I. In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl+ZnCl2, known as Lucas Reagent.II.Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.In the light of the above statements, choose the most appropriate answer from the options given below:a)I is incorrect but II is correctb)Both I and II correctc)Both I and II are incorrectd)I is correct but II is incorrectCorrect answer is option 'D'. Can you explain this answer?.
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