A paramagnetic species among the following is-

1.	A carbocation	2.	A free radical
3.	A carbanion ion	4.	All of the above

The structure of cis-bis (propenyl) ethene is:

1. 

2. 

3. 

4. 

But-2-ene exhibits cis-trans-isomerism due to

1. rotation around C₂-C₃ double bond

2. rotation around C₃-C₄ sigma bond

3. rotation around C₁-C₂ bond

4. restricted rotation around C=C bond

If optical rotation produced by the compound (i) is +52° then that produced by that the compound (ii) is:

1. -52°

2. +52°

3. 0°

4. unpredictable

Number of monochlorinated products (excluding stereo-isomers) obtained from the given reaction are :

Which of the following pairs are enantiomers?                

1. 

2. 

3. 

4. 

How many structural isomers are possible for the compound having molecular formula C₃H₅Br₃?

1. 5                   

2. 4

3. 6                   

4. 8

In the following, the most stable conformation of n-butane is                

1.

2. 

3. 

4. 

Which of the following acid does not exhibit optical isomerism?

1. Maleic acid                           
2. $\mathrm{\alpha }$-amino acid

3. Lactic acid                             
4. Tartaric acid                             

The prefix used for -SH group as per the IUPAC system is-

1. Mercapto

2. Thiol

3. Sulfide

4. None of the above