Grade 9 Class Test 1.1

The chemical name for KOH is...

• potassium oxide

• calcium hydroxide
• magnesium hydroxide
• potassium hydroxide

The anion in the compound CaSO₄ is called ... and has a charge of ...

• sulphate

  -2

• sulfide

  -2

• phosphate

  -4

• sulfate

  -1

The name for the compound FeS is ...

What is the chemical name for NaOH?

• sodium oxide

• sodium hydroxide

• potassium hydroxide

• calcium hydroxide

Which of the following is the chemical formula for magnesium sulfate?

• MgSO₃

• MgSO₄

• MgS

• Mg₂SO₄

The compound CuCO₃ is commonly called ...

Elements like Lithium and Sodium are found in the _________ metal group.

Chlorine - 35 and Chlorine - 37 are isotopes. The following is true for these isotopes ...

• They have the same mass number.
• They have the same number of protons but different number of neutrons.
• They have the same atomic number.
• They have the same number of protons and neutrons.

What is the chemical formula for copper (I) sulfate?

• CuSO₃

• CuSO₄

• CuS

• Cu₂SO₄

What is the common name for H₂SO₄?

• Sulfuric acid

• Hydrochloric acid

• Nitric acid

• Acetic acid