C1.3 Chemical Reactions / C1.4 Acids & Alkalis

Which of these is a chemical reaction?

• Filtering sand and water
• Cooking an egg
• Water evaporating
• Mixing baking ingredients

Which of these contains only chemical reactions?

• Rusting, burning, baking
• Rusting, burning, melting
• Burning, Melting, Freezing
• Cutting, Rusting, Baking

Which statement is true of chemical reactions?

• Do not make new substances
• Create new reactants
• Involve changes of state
• Usually irreversible

Which of these is a physical reaction?

• Burning wood on a fire
• Baking a cake
• Digesting food
• Dissolving sugar in water

Which statement is true of physical reactions?

• Usually irreversible
• Reactants get used up
• Create new products
• Involve changes of state

What is rearranged in chemical reactions?

• Protons
• Atoms
• States
• Boiling Points

What are substances present at the start of a chemical reaction called?

• Reactates
• Reactoids
• Reactants
• Reactives

What are the substances that are made in a chemical reaction called?

• Resultants
• Products
• Presents
• Outcomes

Which of the following is not a way we can tell a chemical reaction may be happening?

• Gets warmer
• Fizzes
• Changes state
• Changes colour

What can be used to speed up a chemical reaction?

• Actalyst
• Dogalyst
• Catalyst
• Analyst