Functional Groups

Q.

The functional group present in carboxylic acids is

1. –CHO

2. –CO

3. –OH

4. –COOH

Q.

Give the common and IUPAC names of the following alcohols: [3 MARKS]

(i) ${\text{CH}}_3\text{OH}$

(ii) ${\text{CH}}_3{\text{CH}}_2\text{OH}$

(iii) ${\text{CH}}_3{\text{CHOHCH}}_3$

Q. A carboxylic group is present in ________.

1. ethylene
2. methanoic acid
3. formaldehyde
4. ethanol

Q. Select the correct IUPAC name for the given compound.

1. Butanol
2. Butanal
3. Propanal
4. Propanol

Q.

Identify the substance underlined in the following
case. An organic compound containing$-COOH$ functional group.

Q. Compound $\left(A\right)$ (molecular formula $C_3{H}_{8}O$) is treated with acidified potassium dichromate to form a product B (molecular formula $C_3{H}_{6}O$). 'B' forms a shining silver mirror on warming with ammoniacal silver nirate. 'B' when treated with an aqueous solution of $H_{2}NCONHN{H}_2\cdot HCl$ and sodium acetate gives a product 'C'. Identify the structure of 'C':

1. $(C{H}_3{)}_{2}C=NCONHN{H}_2$
2. $C{H}_{3}C{H}_{2}CH=NNHCON{H}_2$
3. $(C{H}_3{)}_2=NNHCON{H}_2$
4. $C{H}_{3}C{H}_{2}CH=NCONHN{H}_2$

Q. Enter the number of functional isomer possible for propanone ($C{H}_{3}COC{H}_3$).

1. 1

Q. The functional group in methanol and methanal respectively are :

1. -OH, -CHO
2. -CHO, -OH
3. -OH, -COOH
4. -CHO, -COOH