Which of the following is the correct IUPAC name?

1. 3-Ethyl-4,4-dimethylheptane

2. 4,4-Dimethyl-3-ethylheptane

3. 5-Ethyl-4,4-dimethylheptane

4. 4,4-Bis(methyl)-3-ethylheptane

Subtopic:  Nomenclature |
 73%
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The IUPAC name for  is

1. 1-Hydroxypentane-1,4-dione

2. 1,4-Dioxopentanol

3. 1-Carboxybutan-3-one

4. 4-Oxopentanoic acid

Subtopic:  Nomenclature |
 75%
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The IUPAC name of the given compound is-

1. 1-Chloro-2-nitro-4-methylbenzene

2.  1-Chloro-4-methyl-2-nitrobenzene

3. 2-Chloro-1-nitro-5-methylbenezene

4.  m-Nitro-p-chlorotoluene

Subtopic:  Nomenclature |
 55%
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In which of the following compounds, the carbon marked with an asterisk is most electronegative?

1. CH3-CH2-*CH2-CH3

2. CH3-*CH=CH-CH3

3. CH3-CH2-C*CH

4. CH3-CH2-CH=*CH2

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 85%
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 Functional isomer is not possible for -

1. Alcohols 2. Aldehydes
3. Alkyl halides 4. Cyanides
Subtopic:  Structural Isomers |
 78%
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The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapor in the vapor phase. A suitable method for the extraction of these oils from the flowers is

1.  Distillation

2.  Crystallisation

3.  Distillation under pressure

4.  Steam distillation

Subtopic:  Quantitative Analysis of Organic Compounds |
 66%
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During the hearing of a court case, the judge suspected that some changes in the documents had been carried out. He asked the forensic department to check the ink used at two different places. The technique that can give the best results is-

1. Column chromatography 2. Solvent extraction
3. Distillation 4. Thin layer chromatography
Subtopic:  Purification of Organic Compounds |
 66%
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The principle involved in paper chromatography is

1. Adsorption

2. Partition

3. Solubility 

4. Volatility

Subtopic:  Purification of Organic Compounds |
 57%
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The correct order of decreasing stability of the following carbocations is:

I \( ~~~~~~~~~~~~\oplus\\ CH_3 - CH-CH_3\)                                              
II \( ~~~~~~~~~~~~\oplus\\ CH_3 - CH-OCH_3\) 
 
III \( ~~~~~~~~~~~~\oplus\\ CH_3 - CH-CH_2- OCH_3\)
 
 
1. II>I>III 2. I>II>III
3. II<I<III 4. I<II<III
Subtopic:  Electron Displacement Effects |
 57%
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 The correct IUPAC name for  is _____.

1. 2-Ethyl-3-methylpentane

2. 3,4-Dimethylhexane

3. 2-sec-Butylbutane

4. 2,3-Dimethylbutane

Subtopic:  Nomenclature |
 68%
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