Preservative

Preservatives are substances used to prevent decomposition or undesirable chemical changes. They can be natural, like sugar or salt, which are used to preserve food, or synthetic compounds that extend the shelf life of medicines and biological samples.

What is the primary function of preservatives?

• To increase the nutritional value

• To prevent decomposition and chemical changes

• To change the color of products

• To enhance the flavor of food

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

• Lemon juice

• Vinegar

• Baking soda

• Sugar

What is the role of salt in food preservation?

• To prevent spoilage

• To add sweetness

• To enhance color

• To increase acidity

Synthetic preservatives are primarily used to extend the shelf life of which of the following?

• Fresh fruits

• Vegetables

• Medicines

• Beverages

Which type of preservatives are used in biological samples?

• Synthetic preservatives

• Natural preservatives

• Inorganic preservatives

• Organic preservatives