Reactions 8

What is the test for the presence of oxygen?

• Place a glowing splint into a sample of the unknown gas

• Place a glowing splint into a sample of the unknown gas

• Bubble the unknown gas through lime water

Which outcome proves the presence of carbon dioxide gas?

• A squeaky pop

• Limewater turns cloudy

• Splint reignites

What is a decomposition reaction?

• When a reactant breaks down into two or more simpler products.

• When a compound reacts when heated into two or more simpler products.

• A reaction in which a substance reacts with oxygen.

• When a physical change of state occurs but new products are formed.

What is a thermal decomposition reaction?

• When a reactant breaks down into two or more simpler products.

• When a compound reacts when heated into two or more simpler products.

• A reaction in which a substance reacts with oxygen.

• When a physical change of state occurs but no new products are made.

What is a combustion reaction?

• When a reactant breaks down into two or more simpler products.

• When a compound reacts when heated into two or more simpler products.

• A reaction in which a substance reacts with oxygen.

• When a physical change of state occurs but no new products are made.

Which is an example of a word equation?

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Which is an example of a particle diagram?

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Which is an example of a symbol equation?

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Which test are matched with their proof of presence outcomes?

• A squeaky pop occurs if hydrogen is present.

• The limewater turns cloudy if oxygen is present.

• The splint reignites if hydrogen is present.

• A squeaky pop occurs if carbon dioxide is present.

How many reactants are there in a thermal decomposition reaction?

• 1

• 2

• 3

• 4