Conservante

Preservatives are used to prevent decomposition or unwanted chemical changes. They can be natural, like sugar and salt for food preservation, or synthetic, extending the shelf life of medicines and biological samples.

What is the primary purpose of preservatives?

• To increase the nutritional value of food

• To prevent decomposition and unwanted chemical changes

• To make food more colorful

• To enhance the flavor of food

Which of the following is an example of a natural preservative?

• Lemon juice

• Vinegar

• Sugar

• Baking soda

How do natural preservatives like sugar and salt help in food preservation?

• By adding sweetness to the food

• By absorbing moisture and inhibiting microbial growth

• By making the food more acidic

• By changing the color of the food

What is a key characteristic of synthetic preservatives?

• They are always derived from plants

• They are less effective than natural preservatives

• They are used to extend the shelf life of medicines

• They are only used in food products

In what way do synthetic preservatives differ from natural ones?

• They are more expensive

• They are man-made compounds

• They are less effective

• They are only used in cosmetics