Is burning a magnesium ribbon a physical or chemical change? Give a reason for your answer.

Classify the following reaction: 2H₂O₂ → 2H₂O + O₂.

Balance the chemical equation: __Fe + __Cl₂ → __FeCl₃.

Write the balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl).

What gas is produced when a reactive metal is added to a dilute acid? What is the test for this gas?

Using the activity series, predict whether a reaction will occur if copper (Cu) is added to a solution of silver nitrate (AgNO₃). Explain why.

Classify the reaction: AgNO₃ + NaCl → AgCl + NaNO₃.

What is the test for carbon dioxide gas?

Name the raw materials used in the blast furnace for the extraction of iron.

What is the main reducing agent responsible for converting iron ore to iron in the blast furnace?

Why does gold (Au) exist uncombined in nature?

Write the word equation for the decomposition of calcium carbonate by heat.

What is the key difference between a single displacement and a double displacement reaction?

What are the products when potassium permanganate (KMnO₄) is heated?

Balance the equation for the formation of ammonia: __N₂ + __H₂ → __NH₃.