Which of the following compound requires minimum energy for free rotation across double bond between ring :

1.		2.
3.		4.

Which of the following is not nucleophile:-

1. 

2. 

3. 

4. 

Correct order of acidic strength for following is:-

1. I > II > III > IV

2. I > III > II > IV

3. IV > III > I > II

4. III > I > II > IV

Which of the following although have $\mathrm{\alpha }$-hydrogen but does not show tautomerism :-

1.

2. 

3. 

4. 

The molecule that exhibits non-planarity is:

1.		2.
3.		4.

The aromatic compound among the following is:-

1.		2.
3.		4.

Which carbocation is the most stable among the options provided?

1.		2.
3.		4.

The geometrical isomerism is shown by:-

1.  

2.  

3.  

4.  

Correct stability order of the following carbocation:-

(1) ii > i > iii > iv

(2) i > ii > iii > iv

(3) iii > i > ii > iv

(4) iv > i > ii > iii

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