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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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%
From NCERT
NEET - 2015
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The incorrect statement among the following for a nucleophile is-

1. Nucleophile is a Lewis acid

2. Ammonia is a nucleophile

3. Nucleophiles attack low electron density sites

4. Nucleophiles are not electron seeking

Subtopic:  Nucleophile & Electrophile |
 75%
From NCERT
NEET - 2015
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In Duma's method of estimation of nitrogen, 0.35 g of an organic compound gave 55 ml of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be:

(Aqueous tension at 300 K = 15 mm)

1. 16.45

2. 27.45

3. 44.45

4. 35.45

Subtopic:  Quantitative Analysis of Organic Compounds |
 51%
From NCERT
NEET - 2011
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The most acidic compound among the following is-

1. 2.
3. 4.
Subtopic:  Acidic & Basic Character |
 77%
From NCERT
NEET - 2010
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The IUPAC name of the above mentioned compound is - 

1. 3, 4-Dimethylpentanoyl chloride

2. 1-Chloro-1-oxo-2,3-dimethylpentane

3. 2-Ethyl-3-methylbutanoylchloride

4. 2, 3-Dimethylpentanoyl chloride

Subtopic:  Nomenclature |
 74%
From NCERT
NEET - 2006
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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 optically active compound among the following is-

1. Isobutyric acid

2. beta-Chloropropionic acid

3. Propionic acid

4. alpha-Chloropropionic acid

Subtopic:  Stereo Isomers |
 57%
From NCERT
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Glucose and fructose are-

1. Chain isomers 2. Position isomers
3. Functional isomers 4. Optical isomers

Subtopic:  Stereo Isomers |
 62%
From NCERT
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The optically active compound among the following is-

1. Glycerine 2. Acetaldehyde
3. Glyceraldehyde 4. Acetone
Subtopic:  Stereo Isomers |
 61%
From NCERT
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