6.1 Acids, Bases and oxides

An incomplete word equation is given.

dilute sulfuric acid + metal → salt + Q

What is Q?

• hydrogen

• oxygen

• carbon dioxide

• water

What is missing from the equation below?

acid + alkali → salt + _____

• hydrogen

• oxygen

• carbon dioxide

• water

Which compound is used to control soil acidity?

• calcium hydroxide

• calcium chloride

• calcium sulfate

What is the ionic equation for the reaction between hydrochloric acid and sodium hydroxide?

• 2H⁺ + O^2- → H₂O

• Na⁺ + Cl^- → NaCl

• H⁺ + OH^- → H₂O

Aqueous solution X is added to aqueous ammonium chloride.

The mixture is heated and ammonia gas is given off.

What is X?

• hydrochloric acid

• sodium hydroxide

• sodium chloride

Which of the following is the test for hydrogen gas?

• insert damp red litmus paper

• insert lighted splint, gas produced extinguishes lighted splint with 'pop' sound

• insert glowing splint, gas produced extinguishes lighted splint with 'pop' sound

Which of the following oxides react with both acids and alkalis?

• sodium oxide

• aluminium oxide

• lead(II) oxide

• zinc oxide

When litmus paper is dipped into acidic solutions,

• red litmus turns blue

• blue litmus turns red

Which of the following is a chemical property of acid ?

• acids react with metal to form salt and hydrogen

• acids react with base to form salt and water

• acids react with metal carbonate to form salt, water and carbon dioxide

• acids react with metal chlorides

When sodium hydroxide reacts with ammonium sulfate, the products are water, ________ and ________.

• oxygen and hydrogen

• carbon dioxide and ammonia

• sodium sulfate only

• sodium sulfate and ammonia