Valency and Ions Quiz

Which of the following ions has a valency of 1?

• Mg²⁺ (magnesium)

• H⁺ (hydrogen)

• Pb²⁺ (lead(II))

• Al³⁺ (aluminium)

What is the valency of Fe³⁺ (iron(III))?

• 1

• 2

• 3

• 4

Which of the following is a polyatomic ion?

• Cl⁻ (chloride)

• NH₄⁺ (ammonium)

• Zn²⁺ (zinc)

• Mn²⁺ (manganese(II))

Which ion is classified as a non-metallic monatomic ion with a valency of 2?

• S²⁻ (sulfide)

• N³⁻ (nitride)

• C⁴⁻ (carbide)

• O²⁻ (oxide)

What is the chemical formula for phosphate?

• PO₄³⁻

• SO₄²⁻

• CO₃²⁻

• NO₃⁻

What is the chemical symbol for Sodium?

• S

• Na

• So

• Sn

Which of the following is a covalent compound with the formula CO₂?

• Carbon monoxide

• Carbon dioxide

• Methane

• Silicon dioxide

What is the physical state of a substance labeled with (aq)?

• Solid

• Liquid

• Gas

• Aqueous – dissolved in water

Which acid has the chemical formula H₂SO₄?

• Hydrochloric acid

• Sulfuric acid

• Nitric acid

• Phosphoric acid

What is the chemical formula for Hydrogen peroxide?

• H₂O

• H₂O₂

• HF

• HI