Chemical Reactions Quiz(1)

What is an ion?

• A molecule that does not contain any charged particles

• A positively or negatively charged atom or molecule

• A type of chemical reaction

• A solid formed in a chemical reaction

What is a precipitate?

• A solid formed in a chemical reaction

• A substance that dissolves in water

• A liquid formed during a chemical reaction

• A gaseous product of a reaction

What is a base?

• A substance that increases the concentration of H+ ions in a solution

• A substance that can neutralize an acid

• A substance that reacts with metal to release hydrogen gas

• A substance that dissolves to produce hydrogen ions (H+)

What is neutralisation?

• The formation of a precipitate when two solutions are mixed

• A reaction between an acid and a base to form salt and water

• A reaction where a compound decomposes into simpler substances

• A reaction where a metal reacts with an acid to form a salt

Which term best describes the type of chemical reaction where a single reactant forms two products?

• Decomposition

• Combination

• Displacement

• Precipitation

What term describes a substance that produces hydrogen ions (H⁺) when dissolved in water?

• Base

• Salt

• Acid

• Alkali

What does "insoluble" mean?

• A substance that easily dissolves in water

• A substance that does not dissolve in water

• A substance that evaporates quickly

• A substance that forms a solid precipitate

What is a substance made from positive and negative ions?

• An ionic compound

• A covalent compound

• A molecule

• A metal

What is the chemical formula for calcium chloride?

• CaCl

• CaCl₂

• Ca₂Cl

• Ca₂Cl₂

What is the formula for sodium bromide?

• NaBr

• Na₂Br

• NaBr₂

• Na₂Br₂