Chemical Reactions PRE Quiz

A balanced chemical equation means

• It is written on the middle of the page

• The number of atoms on both sides of the equation are equal

• The weight of the product is the same as the reactants

• The colour of the product matches the reactants

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An example of a physical reaction is

• Sodium and chlorine combining to make salt

• Rust forming on metal

• Liquid water freezing to form ice

• Burning of methane gas

Burning methane is an example of a (an)

• Acid/base reaction

• Combustion reaction

• Synthesis reaction

• Decomposition reaction

Chemistry is

• The study of life and living things

• The study of matter, it's properties and reactions

• The study of matter and energy

• The study of the Earth and its atmosphere

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In a chemical reaction

• Atoms rearrange to make new substances

• Atoms are destroyed

• Atoms are not involved

• Atoms explode

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In a chemical reaction matter is NOT

• Maintained

• The same

• Created or destroyed

• Measurable

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True or false: Chemical reactions involve energy transfer

• True

• False

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The breakdown of water using electricity to create hydrogen gas and oxygen gas is an example of

• A combustion reaction

• A substitution reaction

• A decomposition reaction

• A really bad idea

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True or False: In a chemical reaction, the products are on the left, and the reactants are on the right?

• True

• False

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True or False: The substance involved in a chemical reaction stays the same

• True

• False

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