Acids and Bases and oxides

Is pure water acidic, basic, or neutral?

• Acidic

• Basic

• Neutral

hydrochloric acid

• HCl
• _HClO
• H₃ClO₃
• HClO₃

sulfuric acid

• HSO₃

• H₂SO₃

• H₂SO₄

• H₃SO₄

Mg(OH)₂

• magnesium hydroxide acid
• hydromagnesium acid
• magnesium oxygen hydride
• magnesium hydroxide

A solution turns violet when universal indicator is added. What can be the pH of the solution?

• 2

• 5

• 7

• 13

Baking powder has a pH of 9. It is a

• Strong acid

• Weak acid

• Strong alkali

• Weak alkali

What type of oxide is carbon dioxide

• acidic

• basic

• amphoteric

Metals that form amphoteric oxides are

• lead

• sodium

• zinc

• aluminium

Acids can react with metals, bases and carbonates.

When a reaction does occur, which of them produces a gas?

• metal + acid

• base+ acid

• metal carbonate + acid

Compound X is used to control soil acidity.

What is X?

• calcium nitrate

• calcium hydroxide

• calcium chloride

• calcium sulfate