What causes food to decay or become spoiled?
Factors that can cause food to spoil include microbial, chemical and physical reactions which affect the taste, smell and appearance of a product. Microorganisms are common in foods, especially bacteria, yeasts and molds. These microorganisms are all around us and naturally present in some foods.
What are the causes of food deterioration?
Major causes of food deterioration include the following:
- growth and activities of micro-organisms, principally bacteria, yeasts and moulds;
- activities of natural food enzymes;
- insects, parasites and rodents;
- temperature, both heat and cold;
- moisture and dryness;
- air and in particular oxygen;
- light;
- time.
Is food rotting a chemical reaction?
Explanation: Rotting food: This would be a chemical change, because it’s not reversible and involves changing the bonds of chemicals in the food.
Why is a rotting banana a chemical change?
Bananas rotting are a chemical change. Rotting bananas are a chemical change. In fact, any rotting food, for that matter, is a chemical change. When exposed to the air, these chemicals react in a process known as oxidation, turning the fruit brown.
Why rotting is a chemical change?
Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds. For example, burned wood becomes ash, carbon dioxide, and water. An unexpected color change or release of odor also often indicates a chemical change.
Is wood decomposing a chemical change?
Explanation: rotting wood is a decomposition reaction. The chemicals in the wood ( mainly the hydrocarbon cellulose a polysaccharid ) break down into simpler molecules.
Is rotting of fruits reversible or irreversible?
Explanation: Rotting food: This would be a chemical change, because it’s not reversible and involves changing the bonds of chemicals in the food. The resulting rotten food is chemically different than the initial, non-rotten food.
Is chemical change reversible?
In principle, all chemical reactions are reversible reactions . This means that the products can be changed back into the original reactants .
Why is chemical change not easily reversible?
chemical change never reversed because it produce new substance after reaction which is not reversible . if it is reversed , it can’t called chemical reaction , it called physical reaction .