In pyrrole 

the electron density is maximum on:

1.	2 and 3	2.	3 and 4
3.	2 and 4	4.	2 and 5

Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?

1.		2.
3.		4.

A nitro-compound among the following that does not react with nitrous acid is:

1.		2.
3.		4.

The central dogma of molecular genetics states that the genetic information flows from:

1. amino acid - proteins - DNA

2. DNA - carbohydrates - proteins

3. DNA - RNA - proteins

4. DNA - RNA - Carbohydrates

The correct corresponding order of names of four aldoses with configuration given below respectively, is:

1. L-erythrose, L-threose, L-erythrose, D-threose

2. D-threose, D-erythrose, L-threose, L-erythrose

3. L-erythrose, L-threose, D-erythrose, D-threose

4. D-erythrose, D-threose, L-erythrose, L-threose

In the given reaction   

The product P is:

1.		2.
3.		4.

A nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO₂ to give an unstable compound B. On treatment with phenol, B forms a beautiful coloured compound C with the molecular formula C₁₂H₁₀N₂O. The structure of compound A is:

1.		2.
3.		4.

Consider the reaction,

This reaction will be the fastest in:

1. Ethanol

2. Methanol

3. N, N'-dimethylformamide (DMF)

4. Water

In the below reaction, the structure of "A" is:

1.		2.
3.		4.

Which among the given molecules can exhibit tautomerism? 
 

1.  III only

2.  Both I and III

3.  Both I and II

4.  Both II and III