Types of Chemical Reactions

Carbon dioxide gas is formed when one carbon atom and two oxygen atoms join together. What type of chemical reaction is this?

• Combination

• Decomposition

• Neutralisation

• Precipitation

Hydrogen peroxide breaks down to form water and oxygen. What type of chemical reaction is this?

• Combination

• Decomposition

• Neutralisation

• Precipitation

A solution of sodium chloride and silver nitrate are mixed together, forming a white solid. What is this solid called?

• Acid

• Base

• Precipitate

• Powder

A solution of calcium chloride and sodium carbonate are mixed together, forming a white solid called calcium carbonate. What type of chemical reaction is this?

• Combination

• Decomposition

• Neutralisation

• Precipitation

Which of the following will be neutral and have a pH of 7?

• Hydrochloric acid

• Sodium hydroxide

• Sodium chloride

• Water

Universal indicator is added to a solution of HNO₃ and it appears red. Is it an acid or base?

• Acid

• Base

Universal indicator is added to a solution of KOH and it appears dark blue. What is its pH?

• Less than 7

• 7

• Above 7

A solution of nitric acid is added to a solution of potassium hydroxide (base). A salt called potassium nitrate and water are formed. What type of reaction is this?

• Combination

• Decomposition

• Neutralisation

• Precipitation

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