What is the structure of the dibromo product obtained when propanoic acid reacts with Br₂ in the presence of phosphorus (Br₂/P)?

1.		2.
3.		4.

A reaction among the following tht donot result in the formation of carbon-carbon bonds is -

1. Reimer-tiemann reaction

2. Cannizzaro reaction

3. Wurtz reaction

4. Friedel-Crafts acylation

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

1. $C{H}_{3}COOC{H}_3$

2. $C{H}_{3}CON{H}_2$

3. $C{H}_{3}COOCOC{H}_3$

4. $C{H}_{3}COCl$

Which one is a nucleophilic substitution reaction among the following?

1.  $\mathrm{RCHO}+\mathrm{R}\text{'}\mathrm{MgX}\to \mathrm{R}-\underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}-\mathrm{R}\text{'}$

2.  ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\stackrel{{\mathrm{CH}}_3}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_2\mathrm{Br}+{\mathrm{NH}}_3\to {\mathrm{CH}}_3-{\mathrm{CH}}_2-\stackrel{{\mathrm{CH}}_3}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_2{\mathrm{NH}}_2$

3.  ${\mathrm{CH}}_3\mathrm{CHO}+\mathrm{HCN}\to {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{OH}\right)\mathrm{CN}$

4.  ${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2+{\mathrm{H}}_2\mathrm{O}\stackrel{{\mathrm{H}}^{+}}{\to }{\mathrm{CH}}_3-\underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}-{\mathrm{CH}}_3$

In a set of reactions, m-bromobenzoic acid gave a product D. The product D is:

1.		2.
3.		4.

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

1.  $\mathrm{Zn}$-$\mathrm{Hg}$ with $\mathrm{HCl}$

2.  ${\mathrm{LiAlH}}_4$

3.  ${\mathrm{H}}_2$ and $\mathrm{Pt}$ as catalyst

4.  Glycol with $\mathrm{KOH}$

${\mathrm{CH}}_3\mathrm{CHO}$ and ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{CHO}$ can be distinguished chemically by-

1. Benedict test

2. Iodoform test

3. Tollen's reagent test

4. Fehling solution test

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D)

1. B > A > D > C

2. B > D > C > A

3. A > B > C > D

4. A > C > B >D