Chemical Reactions and Bonds Quiz

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What are the starting molecules of a chemical reaction called?

Products

Neutrons

Protons

Reactants (correct)

Which process involves the conversion of carbon dioxide and water to glucose and oxygen?

Oxidation

Fermentation

Respiration

Photosynthesis (correct)

What do the opposite-headed arrows in a chemical reaction indicate?

Endothermic reaction

Irreversible reaction

Reversible reaction (correct)

Exothermic reaction

At chemical equilibrium, what happens to the relative concentrations of reactants and products?

They remain constant Signup and view all the answers

Which term refers to the making and breaking of chemical bonds?

Chemical reactions Signup and view all the answers

In a chemical equation, what do the numbers in front of the reactants and products represent?

Number of molecules participating in the reaction Signup and view all the answers

What type of bond is formed when electrons are not evenly distributed, leading to attractions between molecules that are close together?

Hydrogen bond Signup and view all the answers

Which type of interaction involves a hydrogen atom attracted to an electronegative atom in living cells?

Van der Waals interactions Signup and view all the answers

What is the resulting charged atom when an electron is stripped by its bonding partner?

Cation Signup and view all the answers

Which type of bond involves the attraction between anions and cations?

Ionic bond Signup and view all the answers

In which type of reaction can weak bonds provide an advantage due to their reversibility?

Reversible reaction Signup and view all the answers

Which type of interaction occurs between molecules that are close together as a result of uneven electron distribution?

Van der Waals interactions Signup and view all the answers

What is the definition of an element?

A substance that cannot be broken down into other substances by chemical reactions Signup and view all the answers

Which of the following elements make up 96% of living matter?

Carbon, hydrogen, oxygen, nitrogen Signup and view all the answers

What are trace elements?

Elements required by an organism in only small amounts Signup and view all the answers

How would you define compounds?

Substances consisting of two or more elements in a fixed ratio Signup and view all the answers

What is the key characteristic of compounds compared to their constituent elements?

They have different properties from their constituent elements Signup and view all the answers

Which substances make up the majority of the remaining 4% of living matter?

Calcium, phosphorus, potassium, sulfur Signup and view all the answers