Preparation of Carboxylic Acids

Q.

The substance which gets oxidized to acids on heating them with solutions of potassium permanganate $KMn{O}_4$ or potassium dichromate $K_{2}C{r}_2{O}_7$ is

1. alkenes

2. alkanes

3. bases

4. alkalis

Q.

Conversion of ethanol to ethanoic acid is a/an:

1. Decomposition reaction

2. Oxidation reaction

3. Reduction reaction

4. Substitution reaction

Q.

Complete the following reaction:
$C{H}_{3}C{H}_{2}OH+2\left[O\right]\underset{KMn{O}_4}{\overset{alk}{\to }}{H}_{2}O+$ ___ .

1. $C{H}_{3}OH$
2. $C{H}_{3}COC{H}_3$
3. $C{H}_{3}COOH$
4. $HCOOH$

Q. Which of the following compounds acts as oxidising agents?

1. PCC
2. $N{a}_{2}C{r}_2{O}_7$
3. $HN{O}_3$
4. $H_{2}Cr{O}_4$
5. NaOCl
6. $LiAl{H}_4$
7. $NaB{H}_4$
8. Na/Hg

Q. Complete the reaction invovled in the conversion of propanol to prpanoic acid:
$C_2{H}_5\mathrm{CHO}\stackrel{H_2{\mathrm{CrO}}_4}{\to }$$\stackrel{H_2{\mathrm{CrO}}_4}{\to }$${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}$

1. $C_2{H}_{5}CHO$
2. $C_2{H}_{5}OC{H}_3$
3. $C{H}_3-CO-C{H}_3$

Q. A compound that gives a positive iodoform test is:

1. Pentanal
2. $2-$ Pentanone
3. $3-$ pentanone
4. $1-$ Pentanol

Q. The compound X, in the reaction, is $X\stackrel{C{H}_{3}Mgl}{\to }Y\stackrel{hydrolysis}{\to }Mg\left(OH\right)I+C{H}_{3}COOH$

1. $C{H}_{3}CHO$
2. $C{O}_2$
3. HCHO
4. $(C{H}_3{)}_{2}CO$

Q. Benzamide on treatment with $POC{l}_3$ gives:

1. Aniline
2. Benzonitrile
3. Chlorobenzene
4. Benzyl amine

Q. Tertiary alcohols $\left(3^o\right)$ having atleast four carbon atoms upon drastic oxidation yield carboxylic acid with

1. Three carbon atom less

2. All the above three options are correct

3. One carbon atom less

4. Two carbon atoms less

Q. $C{O}_2$ on reaction with ethyl magnesium bromide gives

1. Propanoic acid

2. Acetic acid
3. None of these

4. Ethane