The correct order of –I effect is:

1. -NR3+ > -OR  > -F

2. -F > -NR3+ > -OR  

3.-NR3+ > -F  > -OR  

4. -OR  > -NR3+ > -F

Subtopic:  Electron Displacement Effects |
 66%
From NCERT
AIPMT - 1998
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IUPAC  name of  is: 

1. 2-Chloro-3-iodo-2-pentene

2. 2-Chloro-3-iodo-3-pentene

3.  2-Iodo-3-chloro-pentene

4.  None of the above

Subtopic:  Nomenclature |
 82%
From NCERT
AIPMT - 1998
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Which of the following is most reactive towards electrophilic substitution reaction?

1. 2.
3. 4.
Subtopic:  Nucleophile & Electrophile |
 67%
From NCERT
AIPMT - 1998
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The chiral centre is absent in:

1. DCH2-CH2-CH2-Cl

2. CH3-CHD-CH2-Cl

3. CH3-CHCl-CH2D    

4. CH3-CHOH-CH2-CH3

Subtopic:  Stereo Isomers |
 80%
From NCERT
AIPMT - 1998
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The structure of trans-2-hexenal among the following is:

 
1.
2.
3.
4. None of the above

Subtopic:  Nomenclature |
 81%
From NCERT
AIPMT - 1999
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The chiral compound among the following is:

1. 2-Methylpentanoic acid 2. Pentanoic acid
3. 4-Methyl pentanoic acid 4. None of the above
Subtopic:  Stereo Isomers |
 71%
From NCERT
AIPMT - 1999
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Polarisation of electrons in acrolein may be written as:

1.  C+δH2=CH-C-δHO

2.  C-δH2=CH-C+δHO

3.  C-δH2=CH-CH+δO

4.  C+δH2=CH-CHO-δ

Subtopic:  Electron Displacement Effects |
 59%
From NCERT
AIPMT - 2000
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The correct order of stability is:

1. 1–butene > Trans–2–butene > Cis–2–butene
2. Trans–2–butene > 1–butene > Cis–2–butene
3. Trans–2–butene > Cis–2-butene > 1–butene
4. Cis-2–butene > Trans–2–butene > 1–butene

Subtopic:  Electron Displacement Effects |
 65%
AIPMT - 2000
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2-butene shows geometrical isomerism due to:

1. Restricted rotation about double bond

2. Free rotation about double bond

3. Free rotation about single bond

4. Chiral carbon

Subtopic:  Stereo Isomers |
 81%
From NCERT
AIPMT - 2000
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Dihedral angle in staggered form of ethane is:

1. 0°

2. 120°

3. 60°

4. 180°

Subtopic:  Conformational Isomers |
 68%
From NCERT
AIPMT - 2000
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