Which among these can exhibit tautomerism?

1. a only

2. b only

3. c only

4. a and c

Total number of stereoisomers of the compound:-

1. 10

2. 8

3. 6

4. 4

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

Paper chromatography is an example of:

1. Partition chromatography

2. Thin layer chromatography

3. Column chromatography

4. Adsorption chromatography

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because-

1. + R effect of ${CH}_3$ groups 

2. $-$R effect of $-$ CH₃  groups 

3. Hyperconjugation 

4. $-$l effect of $-$CH₃ groups 

The IUPAC name of the compound is :

1. 2,3 - Diemethylheptane

2. 3- Methyl -4- ethyloctane

3. 5-Ethyl -6-methyloctane

4. 4-Ethyl -3 - methyloctane.

The pair of structures that does not represent isomers is:

1.		2.
3.		4.

The presence of a halogen on the benzene ring in a nitration reaction leads to:

Which carbocation is the most stable among the options provided?

1.		2.
3.		4.