Which of the following compound requires minimum energy for free rotation across double bond between ring :-

1. 

2. 

3. 

4. 

Subtopic:  Aromaticity & Polarity |
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Which of the following molecule is non planer:-

1. 

2. 

3. 

4. 

Subtopic:  Aromaticity & Polarity |
 65%
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The aromatic compound among the following is:-

1. 2.
3. 4.
Subtopic:  Aromaticity & Polarity |
 75%
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The most stable carbocation among the following is-

1. 2.
3. 4.

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 77%
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The presence of a halogen on the benzene ring in a nitration reaction leads to:

1. Direct nitro group to come at meta and deactivate the ring due to –I effect of halogen.
2. Direct nitro group to come at ortho and para position and deactivate the ring due to –I effect of halogen.
3. Direct nitro group to come at meta and activate the ring toward nitration reaction.
4. Nitration reaction does not take place due to deactivation caused by –I effect of halogen.
Subtopic:  Types of Reaction |
 71%
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The pair of structures that does not represent isomers is:

1. 2.
3. 4.

Subtopic:  Structural Isomers |
 66%
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Which among these can exhibit tautomerism?

1. a only

2. b only

3. c only

4. a and c

Subtopic:  Structural Isomers |
 56%
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Total number of stereoisomers of the compound:-

1. 10

2. 8

3. 6

4. 4

Subtopic:  Stereo Isomers |
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The effect that makes 2,3–dimethyl-2-butene more stable than 2-butene is-

1. Resonance

2. Hyperconjugation

3. Steric effect

4. Inductive effect

Subtopic:  Electron Displacement Effects |
 83%
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The IUPAC name of the above mentioned compound is - 

1. Cyclohexylidenemethanone

2. Cyclohexylidemethanone

3. Cyclohexylidenylmethanone

4. Cyclohexdenemethanone

Subtopic:  Nomenclature |
 54%
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