What is the decreasing order of stability of the carbocation ions?

1. I>II>III          

2. II>III>I

3. III>I>II          

4. II>I>III

The most acidic compound among the following is:

The correct order of basicities of the following compounds is:

(1)

(2) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{NH}}_2$

(3) ${\left({\mathrm{CH}}_3\right)}_2\mathrm{NH}$

(4) ${\mathrm{CH}}_3-\stackrel{\stackrel{\mathrm{O}}{\left|\right|}}{\mathrm{C}}-{\mathrm{NH}}_2$

1. 2>1>3>4         

2. 1>3>2>4

3. 3>1>2>4         

4. 1>2>3>4

Consider the acidity of the following carboxylic acids

(i) PhCOOH

(ii) o-NO₂C₆H₄COOH

(iii) p-NO₂C₆H₄COOH

(iv)m-NO₂C₆H₄COOH

1. i>ii>iii>iv

2. ii>iv>iii>i

3. ii>iv>i>iii

4. ii>iii>iv>i

The IUPAC name of   

1. 2,3-diethyl butane

2. 3,4-dimethyl hexane

3. 3-methyl pentane

4. 2-ethyl 3-methyl pentane

Hybridisation of N in pyrrole  is

1. sp                               
2. sp²
3. sp³                             
4. sp³d

The most reactive of these compounds towards sulphonation is

1. Toluene                2. Chlorobenzene

3. Nitrobenzene        4. m-Xylene

In the above compound, arrange the nitrogen according to their decreasing basic strength.

1. 1>2>3>4

2. 4>3>1>2

3. 2>4>1>3

4. 3>4>1>2

What is the correct stability order for the following species?

I.
II.
III.
IV.

Which of the following carbanions is the most stable?

1.		2.
3.		4.