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Q. No.
Subtopic: Alcohols: Preparation & Properties |
67%
From NCERT
NEET - 2023
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Subtopic: Mechanism of Dehydration, Methanol & Ethanol |
NEET - 2023
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Subtopic: Ethers: Preparation & Properties, Uses |
66%
From NCERT
NEET - 2023
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Reagents which can be used to convert alcohols to carboxylic acids, are:
(A) CrO3 - H2SO4
(B) K2Cr2O7 + H2SO4
(C) KMnO4 + KOH/H3O+
(D) Cu, 573 K
(E) CrO3+ (CH3CO)2O
Choose the most appropriate answer from the options given below:
(A) CrO3 - H2SO4
(B) K2Cr2O7 + H2SO4
(C) KMnO4 + KOH/H3O+
(D) Cu, 573 K
(E) CrO3+ (CH3CO)2O
Choose the most appropriate answer from the options given below:
| 1. | (B), (C) and (D) only | 2. | (B), (D) and (E) only |
| 3. | (A), (B) and (C) only | 4. | (A), (B) and (E) only |
Subtopic: Alcohols: Preparation & Properties |
65%
From NCERT
NEET - 2023
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Consider the following reactions:
\(R-COOH\xrightarrow[(ii)~H_2O/HCl]{(i)~X}R-CH_2OH\)
\(\small{R-CH=CH_2\xrightarrow[(ii)~H_2O, NaOH, H_2O_2]{(i)~X}R-CH_2-CH_2-OH}\)
Identify 'X' in above reactions:
\(R-COOH\xrightarrow[(ii)~H_2O/HCl]{(i)~X}R-CH_2OH\)
\(\small{R-CH=CH_2\xrightarrow[(ii)~H_2O, NaOH, H_2O_2]{(i)~X}R-CH_2-CH_2-OH}\)
Identify 'X' in above reactions:
| 1. | \(B_2H_6 \) | 2. | \(LiAlH_4 \) |
| 3. | \(NaBH_4 \) | 4. | \(H_2/Pd \) |
Subtopic: Alcohols: Preparation & Properties |
From NCERT
NEET - 2023
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Subtopic: Alcohols: Preparation & Properties | Mechanism of Dehydration, Methanol & Ethanol |
60%
From NCERT
NEET - 2023
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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 |
81%
From NCERT
NEET - 2022
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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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 |
75%
From NCERT
NEET - 2022
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh
| 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 |
81%
From NCERT
NEET - 2022
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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The increasing order of reactivity of the following compounds towards acid-catalyzed dehydration is:
| 1. | \(CH_3-CH_2-OH \) | 2. |  |
| 3. |  |
4. | \(CH_3-C(CH_3)_2-OH \) |
| 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 |
66%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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