An organic compound (A) of the molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_3$ gives a positive Iodoform test but does not reduce Tollen's reagent. When (A) is subjected to acid-catalyzed hydrolysis, another compound B is formed which gives positive Tollen's test. Identify the unknown compound (A).

1.       

2.  

3.  

4.  

$\mathrm{PH} - \mathrm{CHO} \underset{{\mathrm{CH}}_3\mathrm{COONa}/{\mathrm{H}}_2\mathrm{O}}{\overset{{\left({\mathrm{CH}}_3 - \mathrm{CO}\right)}_2\mathrm{O}}{\to }}\left(\mathrm{A}\right)$
$\mathrm{The} \mathrm{prodct} \mathrm{A} \mathrm{is}$

1.        2.   

3.          4.  

${\mathrm{C}}_2{\mathrm{H}}_4\stackrel{{\mathrm{O}}_3/\mathrm{Zn}/{\mathrm{H}}_2{\mathrm{O}}_2}{\to } \mathrm{Product} \left(\mathrm{A}\right)$

Product (A) can give

1. Haloform test

2. Aldol condensation

3. Cannizzaro reaction

4. Both (A) & (B)

1.  RCHO and HCHO

2.  RCOOH and HCOOH

3.  ${\mathrm{RCH}}_3\mathrm{OH} \mathrm{and} \mathrm{HCOOH}$

4.  

${\mathrm{CH}}_3{\mathrm{NO}}_2\stackrel{\left(3{{\mathrm{Cl}}_{2_{}}}_{}+ 3\mathrm{NaOH}\right)}{\to } \mathrm{P}. \text{'}\mathrm{P}\text{'} \mathrm{is}$

1. ${\mathrm{CCl}}_3\mathrm{CHO}$

2. ${\mathrm{CCl}}_3{\mathrm{NO}}_2$

3. ${\mathrm{CHCl}}_3$

4. ${\mathrm{CHCl}}_2{\mathrm{NO}}_2$

The ${\mathrm{pK}}_{\mathrm{a}}$ values of some of the acids are given below

What is the correct order of leaving the ability of their conjugate bases?

1.  

2.  

3.  

4.  

Among the following esters, form a pair of least reactive and most reactive ester towards hydrolysis is-

1.  V. III

2.  VI, II

3.  I, IV

4.  I, V

The product which cannot be formed is

1.  

2.  

3.  

4.  

The product formed in this reaction is

1.          2.  

3.           4.  

The major product of the given reaction is

1.              2.  

3.               4.