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is aromatic because it has:2. 7 p-orbitals and 7 unpaired electrons
3. 6 p-orbitals and 7 unpaired electrons
4. 6 p-orbitals and 6 unpaired electrons
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2. II > I > III
3. II > III > I
4. I > II > III
The structure of 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid among the following is :
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In the Kjedahl’s method for estimation of nitrogen present in a 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. 45.33
3. 35.33
4. 43.33
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2. 16 sigma bonds and 1 pi-bond
3. 9 sigma bonds and 2 pi-bonds
4. 9 sigma bonds and 1 pi-bond
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| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
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2. 18.20
3. 16.76
4. 15.76
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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
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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 electron density sites. |
| 4. | Nucleophiles are not electron-seeking. |
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