The most stable free radical is 

Subtopic:  Reaction Intermediates ; Preparation & Properties |
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Consider the following carbocations 

The correct order of stability is 

1. II>III>I>IV

2. III>I>II>IV

3. III>I>IV>II

4. II>IV>I>III

Subtopic:  Reaction Intermediates ; Preparation & Properties |
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Consider the following resonating structures of HCOOH

The order of stability is-

1. I>II>III>IV 2. IV>I>II>III
3. I>III>II>IV 4. II>I>III>IV
Subtopic:  Electron Displacement Effects |
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The correct order of the rate of expulsion of hydrogen as H+ in the above figure is:

1. 1 > 2 > 3

2. 2 > 3 > 1

3. 2 > 1 > 3

4. 3 > 2 > 1

Subtopic:  Acidic & Basic Character |

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Which alkene is most stable ?

1. CH2=CH-CH2-CH3

2. CH33C-CH=CH2

3. CH3-CH=CH-CH3

4. CH32C=CCH32

Subtopic:  Electron Displacement Effects |
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The aromatic compound among the following is :

Subtopic:  Aromaticity & Polarity |
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Which of the following carbocations is the most stable?

1.  2.  \(\mathrm{(CH}_3){ }_3 \stackrel{\oplus}{\mathrm{C}}\)
3.  \(\mathrm{CH}_2=\mathrm{CH}-\stackrel{\oplus}{\mathrm{C}\mathrm{H}_2}\) 4.  \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C H}}\)
Subtopic:  Reaction Intermediates ; Preparation & Properties |
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Which hydrocarbon is most acidic ?

Subtopic:  Acidic & Basic Character |
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How many chiral centers are present in 3,4-dibromo-2-pentanol?

1. 1

2. 2

3. 3

4. 4

Subtopic:  Stereo Isomers |
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Which of the following compounds is an isomer of methyl vinyl ether?

1. Propanal

2. 1-Propanol

3. Ethyl methyl ether

4. Dimethylether

Subtopic:  Structural Isomers |
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