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- 1. Multiple Choice
The formation of a new substance is an example of
a chemical reaction
a physical change
- 2. Multiple Choice
An example of a chemical reaction is
a can crushing
paper tearing
ice melting
a camp fire
- 3. Multiple Choice
This image shows examples of
physical changes
chemical reactions
- 4. Multiple Choice
The number and type of atoms is the same before and after
a chemical reaction
both a chemical reaction and physical change
a physical change
- 5. Multiple Choice
The starting materials that react with each other are called
materials
products
ingredients
reactants
- 6. Multiple Choice
The materials produced by a chemical reaction are called
ingredients
products
materials
reactants
- 7. Multiple Choice
Water evaporating is
a chemical reaction
a physical change
- 8. Multiple Choice
Total number atoms in reactants = total number atoms in products
True
False
- 9. Multiple Choice
In this chemical reaction there are
3 reactants
2 reactants and 2 products
2 reactants and 1 product
3 products
- 10. Multiple Choice
The part of the equation that is circles represents
a reactant
a product
React to form
- 11. Multiple Choice
The part of the equation circled is an example of
products
reactants
- 12. Multiple Choice
The arrow circled in the equation means
reversible reaction
force
react to form
- 13. Multiple Choice
The correct word equation for the image above is
nitric oxide + ozone = nitrogen dioxide + oxygen gas
nitric oxide + ozone - nitrogen dioxide + oxygen gas
nitric oxide + oxygen gas --> nitrogen dioxide + oxygen gas
nitric oxide + ozone --> nitrogen dioxide + oxygen gas
- 14. Multiple Choice
Select which molecule is missing from the products of this equation
- 15. Multiple Choice
How many reactants are there in this reaction? "When bicarbonate soda and vinegar are mixed together a chemical reaction occurs. This chemical reaction forms sodium acetate, water, carbon dioxide."
3
2
5
6
- 16. Multiple Choice
How many products are there in this reaction? "When bicarbonate soda and vinegar are mixed together a chemical reaction occurs. This chemical reaction forms sodium acetate, water, carbon dioxide."
3
2
4
5
- 17. Multiple Choice
What happens if oxygen is taken away from this reaction?
Wax and Oxygen → Carbon Dioxide + water (vapour)
less water is produced
less products are produced
the chemical reaction stops taking place
the candle still burns but less bright
- 18. Multiple Choice
In elephants toothpaste a chemical reaction occurs
hydrogen peroxide → water + oxygen gas
Which of the following indicates the reactant(s)?
water and oxygen gas
hydrogen peroxide, water and oxygen gas
hydrogen and peroxide
hydrogen peroxide
- 19. Multiple Choice
In elephants toothpaste a chemical reaction occurs
hydrogen peroxide → water + oxygen gas
Which of the following indicates the products(s)?
water and oxygen gas
hydrogen peroxide, water and oxygen gas
hydrogen and peroxide
hydrogen peroxide
- 20. Multiple Choice
*choose multiple answers*
In the experiment 'elephants toothpaste' a chemical reaction occurs. What signs were there that a chemical reaction had occurred?
temperature change
the atoms were seen moving
precipitate formed
release of gas
- 21. Multiple Choice
*multiple answers*
Which of the following are often sings of a chemical reaction?
temperature change
gas being released
salt dissolving
change in colour
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