Chemical Reactions

What are chemical reactions?

• Processes that involve the formation or breaking of bonds between atoms or molecules

• Processes that involve the formation of water

• Processes that involve the formation of carbonic acid

• Processes that involve the disassociation of carbon dioxide

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What are the reactants in the given chemical reaction?

• Molecular hydrogen and molecular oxygen

• Molecular hydrogen and water

• Molecular oxygen and water

• Carbonic acid and hydrogen ion

How many molecules of molecular hydrogen are needed for the reaction to occur?

• One

• Two

• Three

• Four

What happens to the atoms in a chemical reaction?

• Atoms are created or destroyed

• Atoms remain the same

• Atoms change their identity

• Atoms change their charge

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NGSS.HS-PS1-7

What is the role of energy in chemical reactions?

• Energy helps in the formation of bonds

• Energy helps in the breaking of bonds

• Energy increases the chances of reactants colliding

• All of the above

Tags

NGSS.HS-PS1-4

What is the term used to describe a reaction that can go in both directions?

• Irreversible reaction

• Reversible reaction

• Equilibrium reaction

• Disassociation reaction

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What is carbonic acid used for?

• To create rocket fuel

• To produce energy in the space shuttle

• To remove excess carbon dioxide from the bloodstream

• To form carbonated drinks

What happens in an equilibrium reaction?

• Reactants and products are constantly interchanging

• Reactants and products remain the same

• Reactants and products combine to form a new compound

• Reactants and products dissociate into ions

Why are chemical reactions important in biology and the environment?

• They have no impact on biology and the environment

• They are only important in academic settings

• They affect real life processes and systems

• They are only relevant in chemistry experiments

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What is the product of the reaction between molecular hydrogen and molecular oxygen?

• Water

• Carbon dioxide

• Oxygen

• Hydrogen peroxide

Tags

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