UNIT 3 - CHEMCIAL REACTIONS - BIO

Front

WHAT ARE CARBOHYDRATES?

Back

Carbohydrates are macromolecules that provide energy to the body, primarily found in foods like bread, rice, and pasta.

Front

WHAT DOES THE LAW OF CONSERVATION OF MASS STATE?

Back

The Law of Conservation of Mass states that matter cannot be created nor destroyed in a chemical reaction.

Front

HOW CAN WE DETECT HYDROGEN GAS?

Back

Hydrogen gas can be detected during electrolysis by the characteristic 'pop' sound it makes when ignited.

Front

WHICH HAS MORE ENERGY: REACTANTS OR PRODUCTS?

Back

In an exothermic reaction, the reactants have more energy than the products.

Front

WHAT DOES IT MEAN THAT ATOMS ARE REARRANGED IN A REACTION?

Back

It means that during a chemical reaction, the atoms in the reactants are reorganized to form the products, but the total number of atoms remains the same.

Front

DEFINE EXOTHERMIC REACTION.

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat.

Front

DEFINE ENDOTHERMIC REACTION.

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings.

Front

WHAT IS A CHEMICAL REACTION?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

WHAT IS A CATALYST?

Back

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

Front

WHAT IS THE ROLE OF ENERGY IN CHEMICAL REACTIONS?

Back

Energy is required to break bonds in reactants and is released when new bonds form in products.