How many structures of F are possible?

(1) 2

(2) 5

(3) 6

(4) 3

Subtopic:  Conformational Isomers |
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The optically active alkane with lowest molar mass is:

1. CH3CH2CCH

2. CH3CH2-CH|CH3-CH3

3. 

4. CH3CH2.CH2CH3

Subtopic:  Stereo Isomers |
 70%
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a-D-(+)-glucose and β-D-(+)-glucose are :

(1) enantiomers

(2) conformers

(3) epimers

(4) anomers

Subtopic:  Conformational Isomers |
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The absolute configuration of 

 is:

(1) S, R                 

(2) S, S

(3) R, R                 

(4) R, S

 

 

Subtopic:  Stereo Isomers |
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The correct statement regarding electrophile is

1. Electrophile is a negatively charge species and can form a bond by accepting a pair of electrons from a nucleophile
2. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
3. Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
4. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
Subtopic:  Nucleophile & Electrophile |
From NCERT
NEET - 2017
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With respect to the conformers of ethane, which of the following statements is true?

(1) Bond angle remains same but bond length changes

(2) Bond angle changes but bond length remains same

(3) Both bond angle and bond length change

(4) Both bond angles and bond length remain same

Subtopic:  Conformational Isomers |
NEET - 2017
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The IUPAC name of the compound

is-

1. 3-Keto-2-methylhex-4-enal

2. 5-Formylhex-2-en-3-one

3. 5-Methyl-4-oxohex-2-en-5-al

4. 3-Keto-2-methylhex-5-enal

 

 

Subtopic:  Nomenclature |
 70%
From NCERT
NEET - 2017
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The correct order of acidity among the following is:

1. CH2=CH2 >CH≡CH > CH3C≡CH > CH3-CH3

2. CH≡CH > CH3-C≡CH > CH2=CH2 >CH3-CH3

3. CH≡CH > CH2=CH2 > CH3-C≡CH > CH3-CH3

4. CH3-CH3 > CH2=CH2 > CH3-C≡CH > CH≡CH

Subtopic:  Acidic & Basic Character |
 70%
From NCERT
NEET - 2017
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The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is

1. sublimation

2. chromatography

3. crystallisation

4. steam distillation

Subtopic:  Purification of Organic Compounds |
 70%
From NCERT
NEET - 2017
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In pyrrole,

The electron density is maximum on

1. 2 and 3         2. 3 and 4

3. 2 and 4         4. 2 and 5

Subtopic:  Electron Displacement Effects |
 62%
NEET - 2016
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