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Which of the following statements is true regarding the Lucas test?
- a)The reaction with the Lucas reagent is an oxidation reaction.
- b)The reaction is carried out in the presence of a strong base.
- c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.
- d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.
Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements is true regarding the Lucas test?a)T...
In the Lucas test, primary alkanols require a longer reaction time compared to secondary and tertiary alkanols for the formation of a turbidity or precipitate due to their lower reactivity.
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Which of the following statements is true regarding the Lucas test?a)T...
The correct answer is option 'C': The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.
Explanation:
The Lucas test is a chemical test used to differentiate between primary, secondary, and tertiary alkanols based on their reactivity with Lucas reagent. Lucas reagent is a mixture of concentrated hydrochloric acid (HCl) and anhydrous zinc chloride (ZnCl2).
The Lucas test is based on the different rates of reaction of alcohols with the Lucas reagent. The reaction involves the substitution of the hydroxyl (-OH) group of the alcohol with a chloride ion (Cl-) from the Lucas reagent.
The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols due to the difference in their reactivity.
Here's a detailed explanation of each statement and why option 'C' is the correct answer:
a) The reaction with the Lucas reagent is an oxidation reaction:
This statement is false. The reaction with the Lucas reagent is not an oxidation reaction. It is a substitution reaction where the hydroxyl group of the alcohol is replaced by a chloride ion.
b) The reaction is carried out in the presence of a strong base:
This statement is false. The Lucas test is carried out in the presence of Lucas reagent, which is a mixture of hydrochloric acid (HCl) and zinc chloride (ZnCl2). It is not a strong base but rather an acidic solution.
c) The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols:
This statement is true. Primary alkanols react slowly with the Lucas reagent compared to secondary and tertiary alkanols. This is because primary alkanols have a slower rate of reaction due to the steric hindrance caused by the alkyl groups attached to the carbon atom bearing the hydroxyl group. The steric hindrance makes it more difficult for the nucleophilic substitution reaction to occur, resulting in a longer reaction time.
d) The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols:
This statement is false. The Lucas test can differentiate between primary, secondary, and tertiary alkanols. Primary alkanols have the longest reaction time, followed by secondary alkanols, while tertiary alkanols react almost immediately with the Lucas reagent. This difference in reactivity allows the Lucas test to distinguish between primary, secondary, and tertiary alkanols.
Explanation:
The Lucas test is a chemical test used to differentiate between primary, secondary, and tertiary alkanols based on their reactivity with Lucas reagent. Lucas reagent is a mixture of concentrated hydrochloric acid (HCl) and anhydrous zinc chloride (ZnCl2).
The Lucas test is based on the different rates of reaction of alcohols with the Lucas reagent. The reaction involves the substitution of the hydroxyl (-OH) group of the alcohol with a chloride ion (Cl-) from the Lucas reagent.
The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols due to the difference in their reactivity.
Here's a detailed explanation of each statement and why option 'C' is the correct answer:
a) The reaction with the Lucas reagent is an oxidation reaction:
This statement is false. The reaction with the Lucas reagent is not an oxidation reaction. It is a substitution reaction where the hydroxyl group of the alcohol is replaced by a chloride ion.
b) The reaction is carried out in the presence of a strong base:
This statement is false. The Lucas test is carried out in the presence of Lucas reagent, which is a mixture of hydrochloric acid (HCl) and zinc chloride (ZnCl2). It is not a strong base but rather an acidic solution.
c) The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols:
This statement is true. Primary alkanols react slowly with the Lucas reagent compared to secondary and tertiary alkanols. This is because primary alkanols have a slower rate of reaction due to the steric hindrance caused by the alkyl groups attached to the carbon atom bearing the hydroxyl group. The steric hindrance makes it more difficult for the nucleophilic substitution reaction to occur, resulting in a longer reaction time.
d) The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols:
This statement is false. The Lucas test can differentiate between primary, secondary, and tertiary alkanols. Primary alkanols have the longest reaction time, followed by secondary alkanols, while tertiary alkanols react almost immediately with the Lucas reagent. This difference in reactivity allows the Lucas test to distinguish between primary, secondary, and tertiary alkanols.
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Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? for JAMB 2025 is part of JAMB preparation. The Question and answers have been prepared according to the JAMB exam syllabus. Information about Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for JAMB 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer?.
Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? for JAMB 2025 is part of JAMB preparation. The Question and answers have been prepared according to the JAMB exam syllabus. Information about Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for JAMB 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for JAMB.
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Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following statements is true regarding the Lucas test?a)The reaction with the Lucas reagent is an oxidation reaction.b)The reaction is carried out in the presence of a strong base.c)The reaction time for primary alkanols is longer compared to secondary and tertiary alkanols.d)The Lucas test can differentiate between primary and secondary alkanols, but not tertiary alkanols.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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