Introduction to Carboxylic Acids

Q. Vinegar is a solution of:

1. 50% - 60% acetic acid in alcohol.
2. 5% - 8% acetic acid in water.
3. 5% - 8% acetic acid in alcohol.
4. 50% - 60% acetic acid in water.

Q.

A dilute solution of ethanoic acid in water is called:

1. Tincture of iodine

2. Fehling's solution

3. Vinegar

4. Tollen's reagent

Q. Define glacial acetic acid.

Q.

Write the common names of first four members of the homologous series of carboxylic group.

Q.

Which part of an organic compound determines physical and chemical properties?

Q.

What are carboxylic acids? Give their general formula.

Q. The general formula of a carboxylic acid is

1. R–COOH
2. C-O
3. R-CHO
4. R-OOH

Q.

A dilute solution of ethanoic acid in water is very useful in the kitchen - as a pickling and flavouring agent. It is called:

1. Fehling's solution

2. Vinegar

3. Tollen's reagent

4. Tincture of iodine

Q.

What is the second member of the carboxylic acid series?

Q.

Detergents are Sodium or Potassium salts of long-chain

1. aldehydes

2. ketones

3. carboxylic acids

4. sulphonic acids

Q. What happens when ethanoic acid reacts with carbonates and hydrogen carbonates?
[3 Marks]

Q. what is the composition of vinegar

Q. An organic compound ‘A’ with molecular formula $C_2{H}_4{O}_2$ is widely used as a preservative in pickles. It reacts with ethanol to form a sweet-smelling compound ‘B’. Identify A and B.

1. A – ${\mathrm{CH}}_3{\mathrm{COCH}}_3$;
   B – ${\mathrm{CH}}_3{\mathrm{COOCH}}_3$
2. A – ${\mathrm{CH}}_3{\mathrm{COCH}}_3$;
   B – ${\mathrm{CH}}_3{\mathrm{COOC}}_2{H}_5$
3. A – ${\mathrm{CH}}_3\mathrm{COOH}$;
   B – ${\mathrm{CH}}_3{\mathrm{COC}}_2{H}_5$
4. A – ${\mathrm{CH}}_3\mathrm{COOH}$;
   B – ${\mathrm{CH}}_3{\mathrm{COOC}}_2{H}_5$

Q. Ethanoic acid is used in the preparation of pickles. Give reason

Q. Carboxylic acids have a group in its molecule.

1. -OH
2. R-O-R
3. -COOH
4. -CHO

Q.

A dilute solution of ethanoic acid in water is very useful in the kitchen - as a pickling and flavouring agent. It is called:

1. Tincture of iodine

2. Fehling's solution

3. Vinegar

4. Tollen's reagent

Q. Vinegar is a solution of:

1. 5% - 8% acetic acid in water.
2. 50% - 60% acetic acid in water.
3. 50% - 60% acetic acid in alcohol.
4. 5% - 8% acetic acid in alcohol.

Q. Match the following functional groups with their names:

1. P-1; Q-2; R-3; S-4
2. P-2; Q-4; R-1; S-3
3. P-4; Q-2; R-1; S-3
4. P-3; Q-1; R-3; S-4

Q.

Why is pure acetic acid called glacial acetic acid?

Q. Phenolphthalein is not soluble in water.

1. True
2. False

Q.

ethanoic acid is used in preservation of pickles

Q. Write the names of:
First three members of carboxylic acids series.