A paramagnetic species among the following is-

The relative stability order of carbanions CH≡C-, CH₃ - and CH₂=CH^- is ____________

1. $\mathrm{CH}\equiv {\mathrm{C}}^{-}>{\mathrm{CH}}_2={\mathrm{CH}}^{-}>{\mathrm{CH}}_3^{-}$

2. ${\mathrm{CH}}_3^{-}>{\mathrm{CH}}_2={\mathrm{CH}}^{-}>\mathrm{CH}\equiv {\mathrm{C}}^{-}$

3. $\mathrm{CH}\equiv {\mathrm{C}}^{-}<{\mathrm{CH}}_2={\mathrm{CH}}^{-}>{\mathrm{CH}}_3^{-}$

4. ${\mathrm{CH}}_2={\mathrm{CH}}^{-}<\mathrm{CH}\equiv {\mathrm{C}}^{-}<{\mathrm{CH}}_3^{-}$

A solution of (+)-1 chloro-1-phenylethane in toluene racemizes slowly in the presence of small amount of SbCl₅ due to formation of

1. carbanion           2. carbene

3. free radical          4. carbocation

Which of the following is the most stable carbocation

1. 

2. 

3. ${\mathrm{CH}}_2=\mathrm{CH}-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2$

4. ${\mathrm{CH}}_2=\stackrel{\oplus }{\mathrm{C}}\mathrm{H}$

Which of the following happens to be the carbanion with highest stability?

Which of the following carbocations is expected to be most stable?

1. 
2. 
3.  
4. 

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 correct stability order for the following species is:

1. II>IV>I>III

2. II>I>III>IV

3. II>I>IV>III

4. I>III>II>IV

The most stable carbanion among the following is-

1.		2.
3.		4.

Most stable radical is

1. 

2. 

3. 

4.