Gr8 Revision quiz

During a chemical reaction, what are the starting substances called?

• Solutions

• Solutes

• Products

• Reactants

The amount of a that contains 6.02 x 10²³ particles.

• atomic mass

• molar mass

• mole

• atomic number

When one substance breaks down during a chemical reaction.

• Synthesis reaction

• Decomposition reaction

• Combustion reaction

• Single-displacement reaction

The term to explain the loss of electrons.

• oxidation

• reduction

• combustion

• precipitation

The energy needed to start most chemical reactions.

• kinetic energy

• potential energy

• activation energy

• exergonic energy

When energy is released during a chemical reaction in the form of thermal energy.

• Exergonic reaction

• Exothermic reaction

• Endergonic reaction

• Endothermic reaction

The _________ states that atoms, ions, and molecules must collide (bump into each other) in order to react.

• law of conservation of mass

• Le Chatelier's principle

• collision model

• law of conservation of energy

The state in which forward and reverse reactions proceed at equal rates.

• redox

• equilibrium

• synthesis

• irreversible

Le Chatelier's principle states that if a stress is applied to a system at equilibrium the equilibrium shifts in the direction that opposes the stress.

• False

• True

The substance being dissolved in a solution is the _____