For nitration reaction, presence of a halogen at benzene ring :-

(1) Direct nitro group to come at meta and deactivate the ring due to -l 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 takes place due to deactivation cause by -l effect of halogen

Subtopic:  Types of Reaction |
 70%
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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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The most stable carbocation among the following is-

1. 2.
3. 4.

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 77%
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The aromatic compound among the following is:-

1. 2.
3. 4.
Subtopic:  Aromaticity & Polarity |
 75%
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Which of the following molecule is non planer:-

1. 

2. 

3. 

4. 

Subtopic:  Aromaticity & Polarity |
 65%
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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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