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 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
The pair of structures that does not represent isomers is:
1. | 2. | ||
3. | 4. |
Which among these can exhibit tautomerism?
1. a only
2. b only
3. c only
4. a and c
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
The IUPAC name of the above mentioned compound is -
1. Cyclohexylidenemethanone
2. Cyclohexylidemethanone
3. Cyclohexylidenylmethanone
4. Cyclohexdenemethanone
The most stable carbocation among the following is-
1. | 2. | ||
3. | 4. |
The aromatic compound among the following is:-
1. | 2. | ||
3. | 4. |
Which of the following molecule is non planer:-
1.
2.
3.
4.
Which of the following compound requires minimum energy for free rotation across double bond between ring :-
1.
2.
3.
4.