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

(a)              (b) 

(c)       (d) 

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

1. 

2. 

3. 

4.

 +$\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) 

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

1. ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to                          

2.  ${\mathrm{H}}_2\mathrm{O}$ to   

3. ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to                          

4. ${\mathrm{HO}}^{-}$ to 

Which is the major product of the following reaction ?

$\stackrel{{\mathrm{H}}_2\mathrm{S}}{\to }$product

1.         

3.      

4.      

5. 

Compound having molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ may be:

(a) cyclic ether

(b) carbonyl compound

(c) unsaturatd ether or unsaturatd alcohol

(d) all of the above

Which of the following would undergo aldol condensation?

(a) $CC{l}_3$CHO               (b) 

(c) $C{H}_{3}C{H}_2$CHO          (d) HCHO

What is the name of a reagent that reacts with both acetaldehyde and ketone?

1. Ammoniacal AgNO₃

2. Rochelle salt

3. 2,4-Dinitrophenylhydrazine

4. All of the above

What is the structural difference between an aldehyde and a ketone?

1. $\mathrm{\alpha }$-H-atom

2.  H-atom combined with carbonyl group 

3. OH and carbonyl group

4. None of the above

Ketones are less reactive than aldehydes because:

(a) C=O group is less polar in ketones

(b) of electromeric effect

(c) of steric hindrance to the attacking reagent 

(d) none of the above