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Q. No.The increasing order of reactivity of the following compounds towards acid-catalyzed dehydration is:
1.
2.
3.
4.
1.
(II) < (III) < (I) < (IV)
2.
(II) < (I) < (III) < (IV)
3.
(I) < (III) < (IV) < (II)
4.
(III) < (I) < (II) < (IV)
Subtopic: Mechanism of Dehydration, Methanol & Ethanol |
69%
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Subtopic: Alcohols: Preparation & Properties |
63%
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NEET - 2022
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Subtopic: Ethers: Preparation & Properties, Uses |
73%
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NEET - 2022
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Match the reagents (List-I) with the products (List-II) obtained from phenol:
| List-I | List-II | ||
| (A) | (i) NaOH (ii) CO2 (iii) H+ |
(I) | Benzoquinone |
| (B) | (i) Aqueous NaOH + CHCl3 (ii) H+ |
(II) | Benzene |
| (C) | Zn dust, \(\Delta\) | (III) | Salicylaldehyde |
| (D) | Na2Cr2O7, H2SO4 | (IV) | Salicylic acid |
| (A) | (B) | (C) | (D) | |
| 1. | (III) | (IV) | (I) | (II) |
| 2. | (II) | (I) | (IV) | (III) |
| 3. | (IV) | (III) | (II) | (I) |
| 4. | (IV) | (II) | (I) | (III) |
Subtopic: Phenols: Preparation & Properties |
88%
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NEET - 2022
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Which one of the following reaction sequences is the incorrect method to prepare phenol?
| 1. | Aniline, NaNO2 + HCl, H2O, heating |
| 2. | Cumene, O2, H3O+ |
| 3. |  |
| 4. |  |
Subtopic: Phenols: Preparation & Properties |
66%
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NEET - 2022
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| I: | The product of the reaction of phenol with bromine depends on the nature of the solvent. |
| II: | The reaction of phenol with bromine in CHCl3 gives a monosubstituted bromo derivative whereas the reaction of phenol with bromine water yields a trisubstituted bromo derivative of phenol. |
In light of the above statements, choose the most appropriate answer from the options given below:
| 1. | I is correct and II is incorrect |
| 2. | I is incorrect and II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Electrophilic Substitution Reactions, Uses of Phenols |
83%
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NEET - 2022
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below:
| 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. |
| 1. | I is incorrect but II is correct |
| 2. | Both I and II correct |
| 3. | Both I and II are incorrect |
| 4. | I is correct but II is incorrect |
Subtopic: Alcohols: Preparation & Properties |
78%
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| I: | The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group. |
| II: | o-Nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring. |
| 1. | I is incorrect but II is correct. |
| 2. | Both I and II are correct. |
| 3. | Both I and II are incorrect. |
| 4. | I is correct but II is incorrect. |
Subtopic: Phenols: Preparation & Properties |
83%
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Subtopic: Alcohols: Preparation & Properties |
70%
From NCERT
NEET - 2023
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Which amongst the following will be most readily dehydrated under acidic conditions?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Mechanism of Dehydration, Methanol & Ethanol |
51%
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NEET - 2023
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