CBSE
Multiple Choice QuestionsWhich of the following carbocations will be most stable ?
Among the following structures the one which is not a resonating structure of others is
I
II
III
IV
A compound is formed by substitution of two chlorine for two hydrogens in propane. The number of possible isomeric compounds is
4
3
2
5
Which one of the following will show optical isomerism?
OH-CH2-CO2H
CH3-CH(OH)-CO2H
(CH3)2-CH-CO2H
(CH3)2-C(Cl)-CO2H
Among the following statements about the molecules X and Y, the one(s) which correct is (are)
X and Y are diastereomers
X and Y are enantiomers
X and Y are both aldohexoses
X is a D-sugar and Y is an L-sugar
The well-known compounds, (+)- lactic acid and (-)- lactic acid, have the same molecular formula, C3H6O3. The correct relationship between them is:
constitutional isomerism
geometrical isomerism
identicalness
optical isomerism
The two structures written below represent
pair of diastereomers
pair of enantiomers
same molecule
both are optically inactive
Short Answer TypeExplain why aniline is not as basic as ammonia.
Multiple Choice QuestionsWhich one of the following characteristics belong to an electrophile?
It is any species having electron deficiency which reacts at an electron-rich C-centre
It is any species having electron enrichment, that reacts at an electron-deficient C-centre
It is cationic in nature
It is anionic in nature
Among the following carbocations:
Ph2C+CH2Me (I), PhCH2CH2CH+Ph (II), Ph2CHCH+Me (III) and Ph2C(Me)CH2 (IV), the order of stability is:
IV > II > I > III
I > II > III > IV
II > I > IV > III
I > IV > III > II
