Role of Water in Showing Acidity & Alkalinity

Acid in our stomach:

• Hydrochloric acid, HCl

• Sulfuric acid, H₂SO₄

• Ethanoic acid (Acetic acid), CH₃COOH

• Carbonic acid, H₂CO₃

Acid in soft drink:

• Hydrochloric acid, HCl

• Sulfuric acid, H₂SO₄

• Ethanoic acid (acetic acid), CH₃COOH

• Carbonic acid, H₂CO₃

Acid in car battery:

• Hydrochloric acid, HCl

• Sulfuric acid, H₂SO₄

• Ethanoic acid (Acetic acid), CH₃COOH

• Carbonic acid, H₂CO₃

The color of litmus in acid:

• Red

• Blue

• Purple

• Green

The color of litmus in alkali:

• Red

• Blue

• Purple

• Green

Reaction between acid and alkali producing salt and water:

• Combustion

• Neutralization

• Precipitation

• Decomposition

Which type of ion does a base produce when it is dissolved in water?

• oxide

• oxygen

• hydrogen

• hydroxide

Which type of ion does an acid produce when it is dissolved in water?

• oxide

• oxygen

• hydroxonium

• hydroxide

Which of the following about ammonia is correct?

• Its formula is NH₄^+.

• It turns moist red litmus paper blue.

• It has no special odour (smell).

• It is a salt.

Zn(OH)₂ is an example of a...

• acid

• base

• salt

• alkali