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%
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NEET - 2006
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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 optically active compound among the following is-

1. Glycerine 2. Acetaldehyde
3. Glyceraldehyde 4. Acetone
Subtopic:  Stereo Isomers |
 61%
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The arrangement in decreasing order of stability of CH3C2H5,(CH3)2CH and (CH3)3 C free radicals is-

1. CH3C2H5 > (CH3)2CH > (CH3)3 C  

2. (CH3)3 C > (CH3)2CH > C2H5CH3

3. C2H5CH3 > (CH3)2CH > (CH3)3 C

4. (CH3)3 C > (CH3)2CH >  CH3  > C2H5 

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 85%
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The most stable carbocation among the following is:

1. 2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 76%
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The Prussian blue colour obtained during the test of nitrogen by Lassaigne's test is due to the formation of-

1. Fe4[Fe(CN)6]3 2. Na3[Fe(CN)6]
3. Fe(CN)3  4. Na4[Fe(CN)5NOS]
Subtopic:  Qualitative Analysis of Organic Compounds |
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0.2 g of an organic compound on complete combustion produces 0.44 g of CO2. The percentage of carbon is -

1. 50%

2. 60%

3. 70%

4. 80%

Subtopic:  Qualitative Analysis of Organic Compounds |
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The best method used for the separation of naphthalene and benzoic acid from their mixture is -
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation

Subtopic:  Purification of Organic Compounds |
 65%
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The total number of resonating structures (excluded the given structure) formed by the given molecule are :

1. 2 2. 3
3. 4 4. 5
Subtopic:  Electron Displacement Effects |
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The carbocation among the following that doesn't get stabilized by resonance is :

1. 2.
3. 4.

Subtopic:  Electron Displacement Effects |
 75%
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