What is a double displacement reaction?

• A reaction where two elements combine to form a compound

• A reaction where a compound breaks down into two elements

• A reaction where two compounds react to form two new compounds by swapping anions

• A reaction where a single compound is formed from two elements

In the example of a double displacement reaction, what are the products when MgO reacts with CaS?

• MgS and CaO

• MgCa and OS

• MgO and CaS

• MgCaO and S

What is the general formula for a double displacement reaction?

• A + B → AB

• AB → A + B

• AB + CD → AD + CB

• A + BC → AC + B

What is a precipitate reaction in double replacement reactions?

• A reaction where an acid and a base form water

• A reaction where one product is an insoluble ionic compound

• A reaction that produces only gases

• A reaction that involves combustion

What occurs during a neutralisation reaction in double replacement reactions?

• Two gases react to form a liquid

• An acid and a base react to form an ionic compound and water

• A metal reacts with a non-metal to form a salt

• A solid dissolves in a liquid to form a solution

Which of the following ions is generally soluble with Group 1 elements according to the solubility table?

• OH⁻

• S²⁻

• Cl⁻

• CO₃²⁻

What are the products of the reaction between Pb(NO₃)₂(aq) and K₂CO₃(aq)?

• PbCO₃(s) and KNO₃(aq)

• Pb(NO₃)₂(aq) and K₂CO₃(aq)

• PbSO₄(s) and KCl(aq)

• PbCl₂(s) and K₂SO₄(aq)

What is the general result of a neutralization reaction?

• Acid + Base → Salt + Water

• Acid + Base → Gas + Water

• Acid + Base → Salt + Gas

• Acid + Base → Water + Gas

Which of the following is an example of a base?

• HCl

• HNO₃

• NaOH

• H₂CO₃

Which of the following compounds is an acid?

• NaOH

• Ca(OH)₂

• H₂CO₃

• NaCl