Which $\mathrm{\beta }$-keto acid shown will not undergo decarboxylation ?

(1)              

(2) 

(3)    $$\begin{gathered} O \\ \left|\right| \\ Ph-C-C{H}_2-C{O}_{2}H \end{gathered}$$  

(4) $$\begin{gathered} O \\ \left|\right| \\ C{H}_2-C-C{H}_2-C{O}_{2}H \end{gathered}$$

$\underset{\left(2\right) {\mathrm{H}}^{+}, {\mathrm{H}}_2\mathrm{O}}{\overset{\left(1\right) \mathrm{Et}-\mathrm{Li}(3-\mathrm{eq}.)}{\to }}$ (P)     ; Product (P) of the reaction is :

                                               (65% yield)

(a)    (b)   (c)   (d) 

 $\underset{∆}{\overset{{\mathrm{H}}_3\mathrm{O}}{\to }}$ (A) , Product (A) obtained is :

(1) 

(2) 

(3) 

(4) 

Which of the following acid on heating gives geometrical isomers as a product ?

(a)      $$\begin{gathered} OH \\ | \\ C{H}_3-CH-C{O}_{2}H \end{gathered}$$                 (b) 

(c)     $$\begin{gathered} C{H}_3-CH-C{H}_2-C{O}_{2}H \\ | \\ OH \end{gathered}$$   (d) All of these

$\stackrel{\mathrm{MeOH}}{\to }$A$\stackrel{{\mathrm{PCl}}_3}{\to }$B$\stackrel{{\mathrm{MeNH}}_2}{\to }$C ; Product (C) of the reaction is :

(a)                        (b) 

(c)                              (d) 

$\stackrel{{\mathrm{LiAlH}}_4}{\to }$A$\stackrel{\mathrm{PCC}}{\to }$B$\stackrel{{\mathrm{NH}}_2-{\mathrm{NH}}_2}{\to }$C , Product (C) is :

(a)   (b)        (c)      (d) 

$\stackrel{-{\mathrm{CO}}_2}{\to }$A$\stackrel{\mathrm{HCl}}{\to }$B$\stackrel{\mathrm{aq} \mathrm{KOH}}{\to }$C. Product (C) is :

(a)     $$\begin{gathered} O \\ \left|\right| \\ C{H}_3-C{H}_{2}C-H \end{gathered}$$       (b) 

(c)                        (d) 

 +$\mathrm{R}-{\mathrm{CH}}_2-{\mathrm{NH}}_2$$\underset{\mathrm{THF}}{\overset{{\mathrm{K}}_2{\mathrm{CO}}_3}{\to }}$ (A) 

                                                      (71%)

In above reaction identify major product (A) of the reaction:

(a)     (b) 

(c)        (d) 

$\stackrel{\mathrm{KOH}}{\to }$ A  $\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\to }$ B  $\stackrel{{\mathrm{PCl}}_5}{\to }$ C  $\stackrel{{\mathrm{LiAlH}}_4}{\to }$  D  $\stackrel{{\mathrm{H}}^{+}/∆}{\to }$(X)

Product (X) is :

(a)    (b)      (c)        (d) 

A key step in the hydrolysis of acetamide in aqueous acid proceeds by nucleophilic addition of :

(1) ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to    $O$
$\left|\right|$
$C{H}_{3}C N{H}_2$                       

(2)  ${\mathrm{H}}_2\mathrm{O}$ to    $+OH$
$\left|\right|$
$C{H}_{3}C N{H}_2$

(3) ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to  $+OH$
$\left|\right|$
$C{H}_{3}CN{H}_2$                        

(4) ${\mathrm{HO}}^{-}$ to $+OH$
$\left|\right|$
$C{H}_{3}CN{H}_2$