The structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is:

1. 2.
3. 4.

Subtopic:  Nomenclature |
 86%
From NCERT
AIPMT - 2013
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The radical,  is aromatic because it has:
1. 7 p-orbitals and 6 unpaired electrons
2. 7 p-orbitals and 7 unpaired electrons
3. 6 p-orbitals and 7 unpaired electrons
4. 6 p-orbitals and 6 unpaired electrons
Subtopic:  Hybridisation & Structure of Carbon Compounds |
From NCERT
AIPMT - 2013
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The correct order of increasing bond length of  C-H, C-O, C-C and C=C is:

1.  C-C<C=C<C-O<C-H

2.  C-O<C-H<C-C<C=C

3.  C-H<C-O<C-C<C=C

4.  C-H<C=C<C-O<C-C

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 65%
From NCERT
AIPMT - 2011
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The most reactive compound towards electrophilic reagent among the following is:

1. option 2. option
3. option 4. option
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 53%
From NCERT
AIPMT - 2010
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The most stable conformation of n-butane among the following is:

1. 2.
3. 4.
Subtopic:  Conformational Isomers |
 88%
From NCERT
AIPMT - 2010
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The following compounds are given for reference
(1) CH3-CH2
(2) H2C=CH
(3) HC≡C 

The increasing order of basic strength is:
1. (2)>(1)>(3)
2. (3) >(2) >(1)
3. (1) >(3) >(2)
4. (1) >(2)>(3)

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 68%
From NCERT
AIPMT - 2008
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How many stereoisomers does this molecule have? 

CH3CH = CHCH2 CHBrCH3
 

1. 4

2. 6

3. 8

4. 2

Subtopic:  Stereo Isomers |
 63%
AIPMT - 2008
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The stability of carbanions in the following:
 
is in the order of:

1.  (1) > (2) > (3) > (4)

2.  (2) > (3) > (4) > (1)

3.  (4) > (2) > (3) > (1)

4.  (1) > (3) > (2) > (4)

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 62%
AIPMT - 2008
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CH3— CHCl—CH2—CH3 has a chiral center. Which one of the following represents its configuration?

1. \(H_{3}C - \underset{H}{\overset{C_{2}H_{5}}{\underset{|}{\overset{|}{C}}}} - {Cl}\)
2. \(H - \underset{Cl}{\overset{C_{2}H_{5}}{\underset{|}{\overset{|}{C}}}} - {CH}_{3}\)
3. \({Cl} - \underset{H}{\overset{C_{2}H_{5}}{\underset{|}{\overset{|}{C}}}} - {CH}_{3}\)
4. \(H - \underset{C_{2}H_{5}}{\overset{{CH}_{3}}{\underset{|}{\overset{|}{C}}}} - {Cl}\)

Subtopic:  Stereo Isomers |
 60%
AIPMT - 2007
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The general molecular formula, which represents the homologous serious of alkanols is:

1. CnH2nO2

2. CnH2nO

3. CnH2n+1O

4. CnH2n+2O

Subtopic:  Nomenclature |
 57%
From NCERT
AIPMT - 2006
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