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Chemical Reactions

Authored by Brian Riley

Physics

6th - 8th Grade

Used 18+ times

Chemical Reactions
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26 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

CaCO3 represents a chemical

symbol.

formula.

subscript.

reaction.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In chemical reactions, what does the principle of conservation of mass mean?

Matter is not created or destroyed.

The total mass of the reactants is greater than the total mass of the products.

The total mass of the reactants is less than the total mass of the products.

Matter is not changed.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Chemistry is

a characteristic of a substance that can be observed without changing the substance into another substance.

the study of matter and how matter changes.

anything that has mass and takes up space.

a rapid reaction between oxygen and a substance called a fuel.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of a

synthesis reaction.

decomposition reaction.

replacement reaction.

precipitate reaction.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The only sure evidence for a chemical reaction is

the formation of a gas.

a color change.

the production of one or more new substances.

changes in properties.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A material used to decrease the rate of a chemical reaction is a(n)

inhibitor.

catalyst

enzyme.

fuel.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of how to supply activation energy to begin a reaction?

Cool the reaction flask in an ice bath.

Add a catalyst.

Heat the reaction flask on a hot plate.

Add an inhibitor.

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