Maximum enol content is in:

1.
2.
3.
4.

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

The strongest acid, among the compounds given below, is:

Which of the following is the strongest nucleophile?

1. Br^-         
2. OH^-
3. CN^-        
4. CH₃O^-

Which order for basic character of amine is correct for following compounds?

1. 3>1>2>5>4              2. 3>2>1>5>4

3. 3>1>2>4>5              4. 3>2>1>4>5

Which of the following is the most stable carbocation
 

1.
2.
3.
4.

1.    

2.  

3.

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

What is the decreasing order of acidity for the compounds given below?

The correct increasing order of carbon-carbon bond length in the given compounds is: 

1. III<II<I<IV

2. IV<I<II<III

3. I<II<III<IV

4. I<IV<III<II

In the following compounds,

The order of basicity is

1. IV>I>III>II

2. III>I>IV>II

3. II>I>III>IV

4. I>III>II>IV