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Alcohols, Phenols and Ethers
Identification of Primary, Secondary and Tertiary Alcohols
1 question from 1 paper, each with its answer.
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- 1
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- years asked, 2017–2026
- 1 of 10
- of Alcohols, Phenols and Ethers
- 1.54%
Concepts tested
- Lucas test
All Questions
2022 1 question
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Given below are two statements: Statement I: In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl + $ZnCl_2$, known as Lucas Reagent. Statement 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:Statement I is correct: 1°, 2° and 3° alcohols are distinguished in the Lucas test by the time taken for turbidity to appear with conc. HCl + anhydrous $ZnCl_2$. Statement II is incorrect: tertiary alcohols are the most reactive and give turbidity immediately; secondary alcohols take about 5 minutes and primary alcohols do not give turbidity at room temperature. Reactivity towards Lucas reagent: 3° > 2° > 1°
