The compound that is most difficult to protonate is:

1. 2.
3. 4.

Subtopic:  Acidic & Basic Character |
 62%
From NCERT
NEET - 2019
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Paper chromatography is an example of-

1. Partition chromatography

2. Thin layer chromatography

3. Column chromatography

4. Adsorption chromatography

Subtopic:  Purification of Organic Compounds |
 72%
From NCERT
NEET - 2020
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A liquid compound (X) can be purified by steam distillation only if it is:

1. Steam volatile, immiscible with water.

2. Not steam volatile, miscible with water.

3. Steam volatile, miscible with water.

4. Not steam volatile, immiscible with water.

Subtopic:  Purification of Organic Compounds |
 82%
From NCERT
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The aromatic structure(s) out of given structures is/are-

1. A, C, D, F & G only 2. A & D only
3. A, C, E, F only 4. All are aromatic
Subtopic:  Aromaticity & Polarity |
 80%
From NCERT
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The Huckel's rule-based aromaticity is shown by-

(A) (B)
(C) (D)
(E) (F)
 
1. A, B, D only 2. B, D only
3. B, D, E and F only 4. A, B, D, E & F only
Subtopic:  Aromaticity & Polarity |
From NCERT
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The type of structural isomerism shown by given compounds is-

CH3-S-CH2-CH2-CH3 and 

1. Tautomerism 2. Positional isomerism
3. Functional isomerism 4. Ring Chain isomerism

Subtopic:  Structural Isomers |
 72%
From NCERT
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If a liquid compound decomposes at or below its boiling point, then the best method for purification is-

1. Distillation under reduced pressure

2. Azeotropic distillation

3. Gas chromatography

4. Sublimation

Subtopic:  Purification of Organic Compounds |
 86%
From NCERT
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The most stable carbanion species among the following is- 

1. \(CCl^-_3\) 2. \(CH^-_3\)
3. \(CH_2Cl^-\) 4. \(CHCl^-_2\)

Subtopic:  Nucleophile & Electrophile |
 77%
From NCERT
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The resonance hybrid structure will not exist for- 
a. CH3OH
b. R - CONH2
c. CH3CH = CHCH2NH2

1. a, and c  2. a, and b only
3. only a 4. b and c only
Subtopic:  Electron Displacement Effects |
 60%
From NCERT
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Compare the stability of the two resonating structures given below and mark the correct option:

1. (I)  is more stable than (II)

2. (II) is more stable than (I)

3. (I) and (II) both have the same stability 

4. None of the above

Subtopic:  Electron Displacement Effects |
 76%
From NCERT
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