Quiz: Acids, Bases & Oxides

Which ion is responsible for the acidic properties of a solution?

• OH⁻

• H⁺

• Na⁺

• Cl⁻

Which of the following is an example of an alkali?

• NaCl

• NaOH

• CO₂

• HCl

What is always formed when an acid reacts with a base?

• Salt only

• Salt and water

• Salt and hydrogen

• Carbon dioxide

Which gas is produced when acids react with metals?

• Oxygen

• Hydrogen

• Carbon dioxide

• Nitrogen

Which acid produces nitrates as salts?

• Hydrochloric acid

• Sulfuric acid

• Nitric acid

• Carbonic acid

What colour does litmus turn in an alkali?

• Red

• Blue

• Yellow

• Green

Which indicator is red in acid and yellow in alkali?

• Litmus

• Universal indicator

• Methyl orange

• Thymolphthalein

What are bases usually made of?

• Carbon compounds

• Metal oxides or hydroxides

• Non-metal oxides

• Hydrocarbons

Which product is released when acids react with carbonates?

• Oxygen

• Carbon monoxide

• Carbon dioxide

• Nitrogen

What is the pH range of a strong acid?

• 0–2

• 3–6

• 7

• 8–11