Unit#11: Carboxylic Compounds

1

Which compound gives effervescence with sodium bicarbonate?

A Alcohol B Aldehyde C Carboxylic acid D Ester

2

Which group of carboxylic acid takes part in ester formation?

A Carbonyl group B Alkyl group C –OH group D –COO– group

3

Which ester is commonly used as artificial flavor?

A Ethyl ethanoate B Sodium ethanoate C Methanoic acid D Ethanol

4

Esters are generally insoluble in:

A Water B Alcohol C Ether D Organic solvents

5

Which hydrogen atom is replaceable in carboxylic acids?

A Hydrogen of alkyl group B Hydrogen of –OH group C Hydrogen of carbonyl group D All hydrogens

6

Ethanoic acid can be prepared by oxidation of:

A Methanol B Ethanol C Propanol D Butanol

7

What is the by-product of esterification reaction?

A Hydrogen B Carbon dioxide C Water D Oxygen

8

Which catalyst is commonly used in esterification?

A NaOH B H2SO4 C NH3 D HCl

9

Which compound has sour taste?

A Ester B Alcohol C Carboxylic acid D Ether

10

Reaction of ethanoic acid with sodium hydroxide gives:

A Sodium ethanoate and water B Sodium ethanol and water C Ethanol and sodium D Ethane and water

11

Ethanoic acid is commonly known as:

A Formic acid B Acetic acid C Citric acid D Oxalic acid

12

Which acid is widely used in food preservation?

A Methanoic acid B Ethanoic acid C Sulphuric acid D Nitric acid

13

The acidic nature of carboxylic acids is stronger than:

A Mineral acids B Alcohols C Bases D Salts

14

Carboxylic acids turn blue litmus:

A Red B Green C Yellow D No change

15

Which salt is formed when ethanoic acid reacts with sodium metal?

A Sodium acetate B Sodium carbonate C Sodium bicarbonate D Sodium hydroxide

16

Which reaction involves OH group of carboxylic acid?

A Reaction with metals B Reaction with bases C Esterification D Reaction with carbonates

17

Which ester is used as solvent in paints?

A Ethyl ethanoate B Sodium ethanoate C Methanoic acid D Ethanoic acid

18

Carboxylic acids are used in food industry as:

A Sweeteners B Preservatives C Coloring agents D Oxidizing agents

19

Which functional group is responsible for acidity in carboxylic acids?

A –OH B –CO C –COOH D –CHO

20

Reaction involving H-atom of carboxylic acid shows its:

A Basic nature B Acidic nature C Neutral nature D Oxidizing nature

21

Which is the simplest carboxylic acid?

A Ethanoic acid B Methanoic acid C Propanoic acid D Butanoic acid

22

Ethanoic acid is used in everyday life as:

A Soap B Vinegar C Detergent D Perfume

23

Which gas is released when carboxylic acid reacts with bicarbonate?

A Hydrogen B Oxygen C Carbon dioxide D Nitrogen

24

Reaction of carboxylic acids with metals produces:

A Salt and oxygen B Salt and hydrogen gas C Alcohol and hydrogen D Ester and water

25

The process of ester formation is called:

A Hydrogenation B Esterification C Saponification D Neutralization