10 Acids Bases (up to Salts)

Which of the following properties describe an acid?

• insoluble in water

• sour

• pH is less than 7

• corrosive

Which ion is responsible for the acidic properties of hydrochloric acid?

• HCl

• H⁺

• OH^-

• H₂O

Which of the following substances will react with nitric acid to produce effervescence?

• zinc metal

• zinc hydroxide

• zinc sulfate

• zinc carbonate

Sulfuric acid reacts with sodium carbonate to form

• hydrogen gas

• carbon dioxide gas

• sodium sulfate

• water

Which of the following is not a physical property of a base?

• pH is more than 7

• soapy

• bitter

• turns moist blue litmus paper red

Which of the following substances is an alkali?

• aqueous ammonia

• barium hydroxide

• magnesium hydroxide

• aluminium hydroxide

How are alkalis related to bases?

• It refers to strong bases.

• It refers to soluble bases.

• It refers to bases which react with acids.

• It is another name for bases.

Which of the following substances will not react with sodium hydroxide?

• sulfuric acid

• chlorine

• aqueous ammonia

• ammonium sulfate

Alkalis react with ammonium salts to form

• salt and hydrogen gas

• salt and water

• salt, water and ammonia gas

• salt, water and carbon dioxide gas

Which is the most suitable method to make an insoluble salt?

• crystallisation

• precipitation

• titration

• reaction of an acid with excess insoluble reactant