Imp Questions For All Chapters – General Science Class 7
Food Safety
Short Questions
1. What is food spoilage?
→ Food spoilage is when food changes in color, smell, or texture and becomes unsafe to eat.
2. Give one example of food spoilage.
→ Milk turning sour due to bacteria.
3. What are the main causes of food spoilage?
→ Microorganisms, improper storage, heat, and air exposure.
4. What is food preservation?
→ Food preservation is the process of preventing food spoilage and keeping it fresh for a long time.
5. What are preservatives?
→ Preservatives are substances that stop food from spoiling.
6. Give two examples of natural preservatives.
→ Salt and sugar.
7. What is pasteurization?
→ Pasteurization is the heating and cooling of food (like milk) to kill bacteria.
8. Which gas is used to keep chips fresh?
→ Nitrogen gas.
9. What is food adulteration?
→ Food adulteration is mixing harmful substances in food to increase quantity or make it look better.
10. Give one example of food adulteration.
→ Mixing water in milk.
11. How can we check for water in milk?
→ Drop some milk on a smooth surface; if it spreads quickly, it contains water.
12. Name one government organization that checks food safety.
→ FSSAI (Food Safety and Standard Authority of India).
13. What should we check before buying packaged food?
→ Expiry date and ingredients.
14. Which method of food preservation is used for making pickles?
→ Adding salt and oil.
15. Why is food safety important?
→ To protect health, avoid food poisoning, and prevent diseases.
Long Questions
1. What are the common signs of food spoilage?
→ Food spoilage causes bad smell, change in color, slimy texture, and fungal growth. Eating spoiled food can cause food poisoning.
2. What are the advantages of food preservation?
→ Food preservation prevents spoilage, reduces wastage, and keeps food fresh for a long time. It also helps store seasonal food for future use.
3. What is pasteurization and why is it used?
→ Pasteurization is heating and quickly cooling milk or juice to kill harmful bacteria. It makes food safe and increases its shelf life.
4. Why should we avoid eating adulterated food?
→ Adulterated food contains harmful chemicals that can cause food poisoning, stomach pain, and long-term diseases like cancer.
5. How does food get contaminated?
→ Food can get contaminated due to dirty hands, insects, bacteria, or exposure to air. Uncovered and improperly stored food spoils quickly.
6. What is the role of the FSSAI?
→ FSSAI ensures food quality and safety by checking food products and setting rules to prevent food adulteration.
7. How does adding salt and sugar help in food preservation?
→ Salt and sugar absorb water from food and prevent bacteria and fungi from growing, helping in long-term storage.
8. What are the harmful effects of food wastage?
→ Wasting food causes a shortage of food, increases pollution, and wastes resources like water, land, and labor used in production.
Leave a Reply