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.

In the reaction,

${\mathrm{CH}}_3\mathrm{CHO}+\mathrm{HCN}\to {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{OH}\right)\mathrm{CN}$

a chiral centre is produced. This product would be

1.  racemic mixture

2.  meso compound

3.  dextrorotatory

4.  laevorotatory

The compound that has only sp³ carbon atom is -

1.  HCOOH

2.  ${\left({\mathrm{NH}}_2\right)}_{2}CO$

3.  ${\left({\mathrm{CH}}_3\right)}_{3}COH$

4.  $C{H}_{\mathit{3}}CHO$

The number of products that can be obtained theoretically from the monochlorination of 2- methyl butane is

1.  2

2.  3

3.  4

4.  5  

An organic molecule necessarily shows optical activity if it:

1.  Is non-superimposable on its mirror image.

2.  Is superimposable on its mirror image.

3.  Contains asymmetric carbon atoms.

4.  Is non-polar.

The \(C - H\) bond distance is longer in - 

The number of structural isomers of ${\mathrm{C}}_4{\mathrm{H}}_{10}\mathrm{O}$ that are ethers is/are :

1.  1

2.  2

3.  3

4.  4 

Which of the following has a zero dipole moment?

1.  1-butene

2.  cis-2-butene

3.  trans-2-butene

4.  2 methyl-1-propene