In the given transformation, which of the following is the most appropriate reagent ?

(1) Zn-Hg/HCl

(2) Na, Liq. NH3

(3) NaBH4

(4) NH2NH2,OH

 

Subtopic:  Alcohols: Preparation & Properties |
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NEET 2023 - Target Batch - Aryan Raj Singh
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An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts the fastest and by what mechanism:

1. secondary alcohol by SN2

2. tertiary alcohol by SN2

3. secondary alcohol by SN1

4. tertiary alcohol by SN1

Subtopic:  Alcohols: Preparation & Properties |
 76%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Sodium phenoxide when heated with CO2 under pressure at 125°C yields a product which on acetylation produces C.

The major product C would be :

(1) 

(2) 

(3) 

(4) 

Subtopic:  Phenols: Preparation & Properties |
 63%
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A compound with molecular formula C4H10O3 is converted by the action of acetyl chloride to a compound with molar mass 190. The original compound has: 

(1) one OH group

(2) two OH groups

(3) three OH groups

(4) no OH group

Subtopic:  Alcohols: Preparation & Properties |
 62%
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Phenyl ethyl ether with concentrated hydrobromic acid on boiling yields:-

1. Phenol and ethyl bromide

2. Bromobenzene and ethanol

3. Phenol and ethane

4. Bromobenzene and ethane

Subtopic:  Ethers: Preparation & Properties, Uses |
 80%
From NCERT
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The compound that does not react with sodium is-

1. CH3CHOHCH3

2. CH3 —O—CH3

3. CH3COOH

4. C2H5OH

Subtopic:  Alcohols: Preparation & Properties | Ethers: Preparation & Properties, Uses |
 77%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

An organic compound A reacts with sodium metal and forms B. On heating with conc. H2SO4, A gives diethyl ether. So A and B are:
1. C3H7OH and CH3ONa
2. CH3OH and CH3ONa
3. C4H9OH and C4H9ONa
4. C2H5OH and C2H5ONa

Subtopic:  Alcohols: Preparation & Properties | Mechanism of Dehydration, Methanol & Ethanol |
 79%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Phenol on treatment with dil. HNO3 at room temperature gives-

1.
2.
3.
4. All of the above

Subtopic:  Phenols: Preparation & Properties |
 81%
From NCERT
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Links
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NEET 2023 - Target Batch - Aryan Raj Singh

Identify A and predict the type of reactions


1.   and substitution reaction

2. and elimination addition reaction

3.   and cine substitution reaction

4.      and cine substitution reaction

Subtopic:  Ethers: Preparation & Properties, Uses |
 69%
NEET - 2017
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Identify A, X, Y and Z 

(1) A-methoxymethane, X-ethanoic acid, Y-acetate ion, Z-hydrazine

(2) A- methoxymethane, X-ethanol, Y-ethanoic acid, Z- semicarbazide

(3) A-Acetaldehyde, X-ethanol, Y-but-2-en-1-ol, Z- semicarbazone

(4) A-ethanol, X-acetaldehyde, Y-butanone, Z-hydrazone

Subtopic:  Alcohols: Preparation & Properties |
 70%
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