Which of the following statements is not correct for a nucleophile?
1. Nucleophile is a Lewis acid.
2. Ammonia is a nucleophile.
3. Nucleophiles attack low electrons density sites.
4. Nucleophiles are not electron seeking.

Subtopic:  Nucleophile & Electrophile |
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Two possible stereo-structures of CH3CHOH.COOH, which are optically active, are called
1. Diastereomers
2. Atropisomers
3. Enantiomers
4. Mesomers 

Subtopic:  Stereo Isomers |
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2,3-dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?

1. CH32CH-CH|CH3-CH=CH2

2. CH33C-CH=CH2

3. CH32C=CH-CH2-CH3

4. CH32CH-CH2-CH=CH2

Subtopic:  Reaction Intermediates ; Preparation & Properties |
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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:  Purification of Organic Compounds |
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In which of the following compounds, the C—Cl bond ionization shall give the most stable carbonium ion?

1.  

2.  

3. 

4. 

Subtopic:  Reaction Intermediates ; Preparation & Properties |
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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 |
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The enolic form of ethyl acetoacetate is given below 

 

The number of σ and π bonds in the enolic form are respectively-

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 |
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The total number of pi-bond electrons in the following structure are :
1. 4
2. 8
3. 12
4. 16
Subtopic:  Hybridisation & Structure of Carbon Compounds |
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In Kjeldahl’s method for estimation of nitrogen present in the soil sample, ammonia evolved from 0.75g of sample neutralized 10ml. of 1M H2SO4 . The percentage of nitrogen in the soil is-
1. 37.33
2. 45.85
3. 25.75
4. 43.13

Subtopic:  Qualitative Analysis of Organic Compounds |
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The structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is-

1. 

2.  

3.  

4. 

Subtopic:  Nomenclature |
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