Compare enolate A with enolate B.

   

Which of the following statements is true?

1. A is more stable than B                               
2. A and B have the same stability
3. B is more stable than A                               
4. No comparison of stability can be made

$\stackrel{\mathrm{PCC}}{\to }\left(\mathrm{A}\right) \underset{∆}{\overset{\mathrm{dil}. \mathrm{NaOH}}{\to }}\left(\mathrm{B}\right)$

Product (B) is:

1.    
2.      
3.    
4.  

Identify the principal product of the following reaction?

$\underset{\mathrm{ethanol}, \mathrm{water}, \mathrm{heat}}{\overset{\mathrm{NaOH}}{\to }}{\mathrm{H}}_2\mathrm{O} +?$
1.                               
2.

3.      
4.

The enolate ion that reacts with 3-buten-2-one to form (Y) is :

(a)          (b)          (c)           (d) 

$\underset{∆}{\overset{\mathrm{base}}{\to }}$ (A), (A) + $\underset{∆}{\overset{{\mathrm{HO}}^{-}\left(\mathrm{dil}\right)}{\to }}$(B)

Product (B) in the above reaction is :

(a)                         (b) 

(c)                                      (d) 

Which of the following compounds will not undergo Cannizaro reaction, when treated with 50% aqueous alkali?

(a)     $O$
$\left|\right|$
$Ph-C-H$ (b)       (c) ${\mathrm{Me}}_3\mathrm{C}-\mathrm{CHO}$          (d) $\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CHO}$

$\underset{∆}{\overset{{\mathrm{H}}^{+}}{\to }}$(A) $\underset{\mathrm{Zn}}{\overset{{\mathrm{O}}_3}{\to }}$(B) $\underset{∆}{\overset{{\mathrm{HO}}^{-}}{\to }}$(C) ; Product (C) is :

      (72%)

(a)                               (b) 

(c)                          (d) 

$\stackrel{\mathrm{NaOH}}{\to }$Product; Product is :

(a)                            (b) 

(c)                     (d) 

Consider the following reaction

The products in the given reactions are-

1.	+ CH3OH
2.	+ HCO2Na
3.	+ HCOOH
4.	+ CH3OH

Which of the following is the correct order of decarboxylation of $\mathrm{\beta }$-keto carboxylate anion ?

(a) a > b > c > d        (b) c > d > a > b             (c) c > d > b > a           (d) d > c > a > b