What term describes a process where one or more substances change into new substances?

Chemical reaction

Which type of reaction involves two or more substances combining to form a single substance? A) Decomposition B) Combination C) Displacement D) Neutralisation

B) Combination

Riddle: I can disappear when mixed, yet can be seen forming a solid from a solution. What am I?

Precipitate

True or False: An endothermic reaction releases heat energy.

False. An endothermic reaction absorbs heat energy.

The chemical reaction where a compound splits into two or more simpler substances is called ______.

Decomposition reaction

Which of the following is an example of a displacement reaction? A) Zinc and copper(II) sulfate B) Calcium carbonate and heat C) Sodium hydroxide and hydrochloric acid D) Iron and sulfur

A) Zinc and copper(II) sulfate

What do we call a substance that speeds up a chemical reaction without being consumed in the process?

Catalyst

Fill in the blank: A reaction where an acid reacts with a base to produce salt and water is known as ______.

Neutralisation reaction

Which type of reaction involves oxidation and reduction occurring simultaneously?

Redox reaction

True or False: Basic oxides dissolve in water to form acidic solutions.

False. Basic oxides dissolve in water to form basic solutions.

Riddle: I am a type of oxide that can react with both acids and bases. What am I?

Amphoteric oxide

Which reaction involves the formation of a solid from two solutions?

Precipitation reaction

Fill in the blank: The arrangement of metals in order of their reactivity is called the ______.

Reactivity series of metals

In a chemical reaction, the substances that undergo change are called ______.

Reactants

Which of the following is a characteristic of an exothermic reaction? A) Absorbs heat B) Releases heat C) No energy change D) Produces gas

B) Releases heat

True or False: All catalysts are biocatalysts.

False. Only biocatalysts are catalysts that occur in living organisms.