Question

Food material can be preserved at

• A. High temperature
• B. Osmotic pressure
• C. Low temperature
• D. All of the above

Answer 1

The correct option is D All of the above

Food material can be preserved at high temperature, that is either by heating or boiling. Usually a process followed for cooked food and milk to prevent it from being spoilt due to microbial action

Using osmosis as a method of preservation - where sugar or salt is added to preserve food, this increases the ionic concentration on the outside, so food material loses water through exosmosis. Removal of water prevents microbial infestation and increases the shelf life of food. Used for preservation of fish, fruits and vegetables

Low temperature or refrigeration - cold storage, for preservation of fish, fruits, vegetables. Increases shelf life of cooked food

So, the correct answer is 'All of the above'