Geometrical isomerism is not shown by:

1. 

2. 

3. ${\mathrm{CH}}_2 = \mathrm{C}\left(\mathrm{Cl}\right){\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3 - \mathrm{CH} = {\mathrm{CH}}_{} - \mathrm{CH} = {\mathrm{CH}}_2$

The maximum number of stereoisomers possible for 3-hydroxy-2-methyl butanoic acid is:

1. 1               2. 2

3. 3               4. 4

The enol form of acetone after treatment with D₂O gives:

1. $\mathrm{OD}$
$|$
${\mathrm{CH}}_3—\mathrm{C}={\mathrm{CH}}_2$

2. $\mathrm{O}$
$\left|\right|$
${\mathrm{CH}}_3—\mathrm{C}—{\mathrm{CD}}_3$

3. $\mathrm{OH}$
$|$
${\mathrm{CH}}_2=\mathrm{C}—{\mathrm{CH}}_2\mathrm{D}$

4. $\mathrm{OD}$
$|$
${\mathrm{CD}}_2=\mathrm{C}—{\mathrm{CD}}_3$

Maleic and fumaric acids are:

1. tautomers                 

2. geometrical isomers

3. chain isomers             

4. functional isomers

Isomers which can be interconverted through rotation around a single bond are:

1. Conformers             

2. Diastereomers

3. Enantiomers             

4. Positional isomers

How many structures of F are possible?

(1) 2

(2) 5

(3) 6

(4) 3

The optically active alkane with lowest molar mass is:

1. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{C}\equiv \mathrm{CH}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2-\stackrel{{\mathrm{CH}}_3}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_3$

3. 

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2.{\mathrm{CH}}_2{\mathrm{CH}}_3$

a-D-(+)-glucose and β-D-(+)-glucose are :

(1) enantiomers

(2) conformers

(3) epimers

(4) anomers

The absolute configuration of 

 is:

(1) S, R                 

(2) S, S

(3) R, R                 

(4) R, S

The correct statement regarding electrophile is