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

The important step in Cannizzaro's reaction is the intermolecular shift of:

(a) proton

(b) H-atom

(c) hydride ion

(d) hydronium ion

Pinacole is:

(a) 2,3-dimethyl-2,3-butandiol

(b) 3,3-dimethyl-2-propanone

(c) 3-methyl butan-2-ol

(d) none of the above

Benedict's solution provides:

(a) Ag⁺

(b) Cu²⁺

(c) Ba²⁺

(d) Li⁺

Acetaldehyde undergoes self condensation in presence of aluminium ethoxide to give ethyl acetate. This reaction is called:

(a) Perkin reaction

(b) Tischenko's reaction

(c) Cannizzaro's reaction

(d) Aldol condensation