Chemical Reactions

What is the definition of a Reactant

• The substance/s formed after a chemical reaction

• The chemicals that react together during a chemical reaction.

• An explosion

• Something that is extremely reactive

A substance that is formed as the result of a chemical reaction is a __________________

• Starters

• Reactant

• Product

• Enders

What are the reactants in water

• H₂O

• H_{2 +} O

• H₂ + O₂

• 2 Hydrogen + Oxygen

Which of the following is an example of a chemical change/reaction?

• Water freezes to form Ice

• Sugar dissolves in water

• Rocket Fuel burning

• Sawing wood

Q5. Which one shows that a chemical reaction has occurred?

• Melting

• Bending

• Dissolving

• Formation of gas

Which of the following IS a physical change?

• Milk going Sour

• Getting a Haircut

• Rusting of Iron

• Toast Burning

What type of change occurs when a new substance is formed that has different properties from the original substances?

• Chemical Change

• Mutation

• Nuclear change

• Physical Change

What happens to chemical bonds during a chemical reaction?

• When bonds are broken energy is released

• When bonds are broken energy is taken in

• When new bonds are made energy is released

• When new bonds are made energy is taken in

What is meant by effervescence

• Bubbles or gas being produced

• Smelly Feet

• The production of light

• An EXPLOSION

What is the BEST definition of a chemical reaction?

• When two things combine and EXPLODE.

• When Reactants combine and one or more NEW substances are formed (i.e Product)