Which of the following compound exhibit optical isomerism?
1.
2.
3.
4. All of these
Arrange the following in order of their reactivity toward electrophilic substitution reaction:-
1. I > II > III > IV
2. IV > III > II > I
3. II > I > IV > III
4. II > I > III > IV
Which of the following compound requires minimum energy for free rotation across double bond between ring :-
1.
2.
3.
4.
Which of the following molecule is non planer:-
1.
2.
3.
4.
The aromatic compound among the following is:-
1. | 2. | ||
3. | 4. |
The most stable carbocation among the following is-
1. | 2. | ||
3. | 4. |
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. |
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