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%
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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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Which among the given molecules can exhibit tautomerisrn?


1. III Only
2. Both I and III
3. Both Iand II
4. Both II and III

Subtopic:  Structural Isomers |
 62%
NEET - 2016
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The correct order of strengths of the carboxylic acids :-



(a) I>II>III
(b) II>III>I
(c) III>II>I
(d) lI>I>IlI

Subtopic:  Acidic & Basic Character |
 55%
NEET - 2016
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The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is:

1. The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain
2. The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has a torsional strain
3. The staggered conformation of ethane is more stable than the eclipsed conformation because staggered conformation has no torsional strain
4. The staggered conformation of ethane is less stable than eclipsed conformation because staggered conformation has torsional strain
Subtopic:  Conformational Isomers |
 82%
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NEET - 2016
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In Duma’s method for estimation of nitrogen, 0.25g of an organic compound gave 40 mL

of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension

at 300 K is 25 mm, the percentage of nitrogen in the compound is

1. 17.36

2. 18.20..

3. 16.76

4. 15.76

Subtopic:  Quantitative Analysis of Organic Compounds |
 51%
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NEET - 2015
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The compound that gives the most stable carbonium ion after C- Cl bond ionisation among the following  is-

1. 2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
From NCERT
NEET - 2015
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consider the following compounds

hyperconjugation occurs in 

1. I only

2. II only

3. III only

4. I and III

Subtopic:  Electron Displacement Effects |
 62%
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NEET - 2015
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Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?

Subtopic:  Nucleophile & Electrophile |
 69%
NEET - 2015
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The enolic form of ethyl acetoacetate is given below. The number of sigma and pi bonds in the enolic form of ethyl acetoacetate are -

1. 18 sigma bonds and 2 pi-bonds

2. 16 sigma bonds and 1 pi-bond

3. 9 sigma bonds and 2 pi-bonds

4. 9 sigma bonds and 1 pi-bond

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 85%
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NEET - 2015
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