Types of reactions.

Question 1

What is a synthesis reaction?

Answer 1

When two or more reactants combine to make a single product. Example: 2H₂ + O₂ → 2H₂O

Question 2

What is a decomposition reaction?

Answer 2

When a single reactant breaks down into two or more products. Example: 2H₂O → 2H₂ + O₂

Question 3

What is a Displacement reaction?

Answer 3

When a single element replaces another element in a compound. Example: Zn + CuCl₂ → ZnCl₂ + Cu
Or when two compounds exchange ions to form two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃

Question 4

What is a combustion reaction?

Answer 4

When a substance reacts rapidly with an oxidant, usually oxygen, to produce heat or light. Example: CH₄ + 2O₂ → CO₂ + 2H₂O

Question 5

What is a neutralisation reaction?

Answer 5

An acid and a base react to produce a salt and water. Example: NaOH + HCl → NaCl + H₂O

Question 6

What is a redox reaction?

Answer 6

A reaction which involves the transfer of electrons. Example: Zn + 2H⁺ → Zn²⁺ + H₂

Question 7

What is an addition reaction?

Answer 7

When atoms are added to a compound containing a double or triple bond.