Maharashtra Board Class 7 Science Chapter 5 Food Safety Solutions

1. Complete The Following Statements By Using The Correct Option From Those Given Below. (Irradiation, dehydration, pasteurization, natural, chemical)

Question a. Drying the food grains from farms under the hot sun is called ............
Answer: dehydration
In simple words: Drying food in the sun removes water, which prevents spoilage by microorganisms. This process is known as dehydration.

🎯 Exam Tip: Understanding common food preservation methods like dehydration is crucial for multiple-choice and fill-in-the-blank questions.

Question b. Materials like milk are instantly cooled after heating up to a certain high temperature. This method of food preservation is called ............
Answer: pasteurization
In simple words: Pasteurization is a heat treatment that kills harmful bacteria in food, like milk, by heating and then rapidly cooling it, extending its shelf life.

🎯 Exam Tip: Knowing specific food preservation techniques and their definitions is important for recalling concepts accurately.

Question c. Salt is a ........... type of food preservative.
Answer: natural
In simple words: Salt is a natural substance used to preserve food by drawing out moisture and inhibiting microbial growth.

🎯 Exam Tip: Differentiate between natural and chemical preservatives to answer classification questions correctly.

Question d. Vinegar is a ............. type of food preservative.
Answer: chemical
In simple words: Vinegar, specifically its acetic acid content, acts as a chemical preservative by lowering the pH of food, making it unsuitable for microbial growth.

🎯 Exam Tip: Be able to identify common examples of both natural and chemical food preservatives.

2. Answer The Following Questions In Your Own Words.

Question a. How is milk pasteurised?
Answer: Boil the milk at 80°C for 15 minutes and cool it quickly. This destroys the microbes present in the milk and it can remain for a longer duration. This process is called pasteurization of milk.
In simple words: Milk is pasteurized by heating it to 80°C for 15 minutes and then rapidly cooling it, which kills harmful microbes and extends its freshness.

🎯 Exam Tip: Remember the specific temperature and time required for pasteurization as this is a common factual question.

Question b. Why should we not consume adulterated food materials?
Answer: Different types of adulterants affect our health in different ways. Some adulterants cause abdominal discomfort or poisoning while some may affect the functioning of some organs if consumed over a long period of time or even cause cancer.
In simple words: Adulterated food contains harmful substances that can cause immediate discomfort, poisoning, or long-term health problems like organ damage or cancer.

🎯 Exam Tip: Focus on the immediate and long-term health consequences when explaining why adulterated food should be avoided.

Question c. What precautions do your parents take to keep foodstuffs safe?
Answer: Our parents take following care to keep foodstuffs safe
1. Drying of grains.
2. Boiling of milk, soups and curries from time to time.
3. Refrigeration of vegetables, fruits, milk and cooked food.
4. Candying of jams.
5. Use natural preservatives like oil, spices, neem leaves, salt, etc.
6. Use chemical preservatives in sauces, ketchups, pickles, jams and squashes.
In simple words: Parents keep food safe by drying grains, boiling perishables, refrigerating fresh foods, candying jams, and using both natural and chemical preservatives.

🎯 Exam Tip: Provide a diverse list of methods, covering different types of food and preservation techniques, for a comprehensive answer.

Question d. How does food spoilage occur? Which are the various factors spoiling the food?
Answer: Food spoilage is the process in which food deteriorates to the point in which it is not edible to humans or its quality of edibility becomes reduced.
Following are the factors for spoiling of food:
1. Bacteria causes food to spoil
2. Incorrect storage may spoil the food.
3. Infestation by pests.
4. Chemical reaction takes place in food and it gets spoiled.
In simple words: Food spoilage occurs when food becomes unfit to eat due to factors like bacterial growth, improper storage, pest infestation, and undesirable chemical reactions.

🎯 Exam Tip: Clearly define food spoilage and then list distinct, major factors contributing to it.

Question e. Which methods of food preservation would you use?
Answer: I use following methods to preserve the food:
1. Freezing
2. Boiling
3. Salting of pickles
4. drying of grains
5. candying of jams.
In simple words: To preserve food, I would use methods like freezing, boiling, salting for pickles, drying grains, and candying jams to prevent spoilage.

🎯 Exam Tip: When asked about personal methods, list a variety of techniques to show a broad understanding of food preservation.

3. What Shall We Do?

Question a. There are vendors selling uncovered sweet-meats in open places in the market.
Answer: We should tell them to sell the covered sweets because uncovered sweets are harmful to eat because it contains dust, dirt and germs. And buyers also should not purchase these uncovered sweets.
In simple words: We should advise vendors to cover sweet-meats to protect them from dust, dirt, and germs, and consumers should avoid buying uncovered sweets for health safety.

🎯 Exam Tip: When providing remedies, include both advice for sellers and actions for consumers.

Question b. A 'pani-puriwala' is serving the panipuri with dirty hands.
Answer: We should tell him to wear gloves before serving panipuri because dirty hands contain dirt and germs which are harmful to us.
In simple words: We should tell the pani-puriwala to wear gloves when serving to prevent the transfer of dirt and germs from dirty hands, ensuring hygiene.

🎯 Exam Tip: Highlight the immediate health risk (dirt and germs) and a direct, practical solution (wearing gloves).

Question c. We have purchased a large quantity of fruits and vegetables.
Answer: We should keep them in refrigerator because in refrigerator, due to low temperature, fruits and vegetables do not spoil and biological and chemical reactions in fruits and vegetables are slowed down at low temperature.
In simple words: Large quantities of fruits and vegetables should be refrigerated to slow down spoilage by reducing biological and chemical reactions at low temperatures.

🎯 Exam Tip: Explain the scientific principle (low temperature slows reactions) behind the recommended action (refrigeration).

Question d. We need to protect foodstuffs from pests like rats, cockroaches, wall-lizards etc.
Answer:
1. If we do not protect foodstuffs from pests like rats, cockroaches, wall-lizards etc. then the food get spoiled by them and germs carried by them enters into the food.
2. If we eat this food then we may get food poisoning and we fall sick so we need to protect foodstuffs from pests like rat, cockroaches, wall lizards etc.
In simple words: Protecting foodstuffs from pests is crucial because they spoil food and spread germs, which can lead to food poisoning and illness if consumed.

🎯 Exam Tip: Emphasize both the spoilage and health hazard aspects of pest contamination in food.

4. Find The Odd-Man-Out.

Question a. Salt, vinegar, citric acid, sodium benzoate.
Answer: Salt
In simple words: Salt is a natural preservative, while vinegar, citric acid, and sodium benzoate are commonly used chemical preservatives.

🎯 Exam Tip: Identify the common characteristic among most items and the unique characteristic of the odd one out (natural vs. chemical preservative).

Question b. Lakhi dal, brick dust, metanyl yellow, turmeric powder.
Answer: Turmeric powder
In simple words: Turmeric powder is a food ingredient, whereas Lakhi dal, brick dust, and metanyl yellow are common adulterants found in food.

🎯 Exam Tip: Recognize actual food items versus substances used for adulteration.

Question c. Banana, apple, guava, almond.
Answer: Almond
In simple words: Banana, apple, and guava are fruits, while almond is a nut.

🎯 Exam Tip: Group items based on their botanical classification (fruits vs. nuts/seeds).

Question d. Storing, freezing, settling, drying
Answer: Storing
In simple words: Freezing, settling, and drying are specific methods of food preservation, while storing is a general act that may or may not involve preservation techniques.

🎯 Exam Tip: Distinguish between general actions and specific food preservation techniques.

5. Complete The Chart Below.

Question a.

Answer:

In simple words: This chart identifies common adulterants found in specific food items, such as metanil yellow in turmeric, papaya seeds in black pepper, iron filings in rava, and sugar/water/jaggery in honey.

🎯 Exam Tip: Memorize common adulterants associated with various food products for direct recall questions.

6. Explain Why This Happens And Suggest Possible Remedies.

Question a. Qualitative wastage of food.
Answer: Qualitative wastage of food happens due to wrong methods of protecting food, excessive use of food preservatives, over-cooking, washing the vegetables after cutting them, mis-handling of fruits like grapes and mangoes, mis-calculation of the time required to transport food from producers to consumers are some of the reasons of qualitative wastage of food.
Possible remedies:
1. Avoid overcooking of food.
2. Store grains and other perishable foodstuffs like vegetables, fruits, milk etc. using proper methods.
3. Wash fruits and vegetables before cutting it.
In simple words: Qualitative food wastage occurs from improper handling, overcooking, incorrect preservation, or bad transport timing, and can be remedied by proper cooking, storage, and washing practices.

🎯 Exam Tip: Distinguish qualitative from quantitative wastage and provide practical, actionable remedies for each cause identified.

Question b. The cooked rice is underdone.
Answer: Sometimes in a hurry if we cook the rice it is underdone.
Possible remedies: Use proper pressure cooker to cook the rice.
In simple words: Rice can be underdone due to rushed cooking; using a proper pressure cooker can ensure it cooks thoroughly.

🎯 Exam Tip: For problems related to cooking, suggest practical kitchen solutions.

Question c. The wheat that was bought is a bit moist.
Answer: Sometimes due to sudden rain, wheat gets a bit moist. Possible remedies: Do not store the moist wheat, it gets spoiled due to fungus so first sundry it and then store in a clean and dry container to avoid microbial growth.
In simple words: Moist wheat, often from rain, can spoil due to fungus; it should be sun-dried thoroughly before storing in dry containers to prevent microbial growth.

🎯 Exam Tip: Explain the spoilage mechanism (fungus) and provide a two-step remedy: drying then proper storage.

Question d. The taste of yoghurt is too sour/slightly bitter.
Answer: The taste of yoghurt is too sour/slightly bitter means it is spoiled. This happens if it is not kept in the refrigerator.
Possible remedies:- Always keep the yoghurt in refrigerator to avoid biological and chemical reactions in food materials.
In simple words: Sour or bitter yogurt indicates spoilage, likely because it wasn't refrigerated; always keep yogurt in the refrigerator to prevent adverse biological and chemical reactions.

🎯 Exam Tip: Connect food spoilage symptoms (taste change) to their root cause (improper storage/temperature) and provide a preventative solution.

Question e. Cut fruits turned black.
Answer: Fruit contains an enzyme called polyphenol oxidase or tyrosinase that reacts with oxygen. The oxidation reaction basically forms a sort of rust on the surface of fruits so it turns black.
Possible remedies:
1. Coat the fruits with sugar syrup
2. Add lemon juice on fruits.
In simple words: Cut fruits turn black due to enzymatic oxidation by polyphenol oxidase reacting with oxygen, forming a rust-like discoloration. Remedies include coating them with sugar syrup or adding lemon juice to inhibit this reaction.

🎯 Exam Tip: Provide the scientific reason (enzymatic oxidation) for the phenomenon and offer practical methods to prevent it.

7. Give Reasons.

Question 1. Food remains safe at 5° Celsius.
Answer: Food remains safe at 5° Celsius because at 5°C, micro-organisms stop growing.
In simple words: Food stays safe at 5°C because this low temperature significantly slows down or stops the growth of most spoilage-causing microorganisms.

🎯 Exam Tip: State the scientific reason (inhibition of microbial growth) directly when explaining temperature effects on food safety.

Question 2. Nowadays, food is served in buffet style during large gatherings.
Answer: Nowadays, food is served buffet style during large gatherings because due to buffet style quantitative wastage of food can be avoided, as people take only as much as they could eat.
In simple words: Buffet style serving helps reduce food wastage at large gatherings because people can choose and take only the amount of food they intend to eat, minimizing leftovers.

🎯 Exam Tip: Focus on the efficiency and waste reduction benefits of the buffet system.

Project:

Question 1. Go to your kitchen und take notes about the food safety measures and the food wastage you see there.
Answer:
Quantitative wastage of food:
1. Wrong methods of farming like hand sowing of, ts seeds, inadequate threshing, improper storage and wrong methods of distribution are some reasons for quantitative wastage of food.
2. Besides, much food is wasted as a result of the custom of offering and serving too much food to guests at traditional feasts or banquets.
3. Had it not been wasted, all this food could have met the need of many others
Qualitative wastage of food: Using wrong methods of protecting food, excessive use of food preservatives, over-cooking, washing the vegetables after cutting them, mis-handling of fruits like grapes and mangoes, mis-calculation of the time required to transport food from producers to consumers, are some of the causes of quantitative wastage of food.
In simple words: Food wastage in the kitchen can be both quantitative (e.g., over-serving, inefficient farming) and qualitative (e.g., overcooking, improper storage), indicating areas for improved food safety and conservation practices.

🎯 Exam Tip: This question requires observation and analytical skills to categorize wastage into quantitative and qualitative types based on real-world examples.

Question 2. In a science exhibition demonstrate the various methods of detecting food adulteration.
Answer: Food is adulterated by the following ways:
1. Removal of some important components of food. e.g. removal of fat content of milk, essence of cloves, cardamoms, etc.
2. Mixing of a low quality inedible or cheaper material or harmful colour with food.
3. Mixing of some harmful materials like small stones, fine sand, iron filings, urea, dung of horse, sawdust etc.
In simple words: Food adulteration involves removing vital components, adding low-quality or harmful substances, or mixing in inedible materials to increase quantity or appearance.

🎯 Exam Tip: For a demonstration, clearly list the types of adulteration, and prepare simple tests (like those in Q.2. from 'How will you find out...') to show detection.

Complete The Following Statements By Using The Correct Option From Those Given Below. (Irradiation, dehydration, pasteurization, natural, chemical)

Question 1. .................... is celebrated as "World Food Day".
Answer: 16th October
In simple words: World Food Day is celebrated on October 16th each year to raise awareness about global hunger and promote food security.

🎯 Exam Tip: Remember important dates like World Food Day related to food and health topics.

Question 2. FSSAI means ....................
Answer: Food Safety and Standardization Authority of India
In simple words: FSSAI stands for the Food Safety and Standards Authority of India, which is responsible for regulating food safety in India.

🎯 Exam Tip: Knowing the full forms of important regulatory bodies related to food safety is essential.

Question 3. .................... gas is filled in tight packets of potato wafers.
Answer: Nitrogen
In simple words: Nitrogen gas is used in potato wafer packets to prevent them from becoming stale and rancid by displacing oxygen.

🎯 Exam Tip: Understand the purpose of using inert gases like nitrogen in food packaging.

Question 4. Common name of acetic acid is ....................
Answer: Vinegar
In simple words: Acetic acid is commonly known as vinegar and is used as a food preservative and flavoring agent.

🎯 Exam Tip: Relate chemical names to their common household equivalents, especially for food-related substances.

Question 5. .................... is sprayed on the gunny bags containing food grains.
Answer: Melathion
In simple words: Malathion is an insecticide sprayed on gunny bags to protect stored food grains from pests.

🎯 Exam Tip: Identify chemicals used for pest control in food storage to ensure food safety.

Question 6. .................... is used in smoking method.
Answer: Aluminium phosphide
In simple words: Aluminium phosphide is used in the smoking method as a fumigant to protect stored food from insects and pests.

🎯 Exam Tip: Connect specific chemical fumigants to their application in food preservation methods like smoking.

Question 7. .................... and .................... are emitted by radioactive isotopes in irradiation method.
Answer: X - rays, gamma rays
In simple words: In food irradiation, X-rays and gamma rays, emitted by radioactive isotopes, are used to kill bacteria and pests, thus preserving food.

🎯 Exam Tip: Know the types of radiation used in food irradiation (X-rays, gamma rays) and their source (radioactive isotopes).

Question 8. In Maharashtra, irradiation plants have been installed at .................... for onions and potatoes and at for spices and condiments.
Answer: Lasalgaon, Navi Mumbai
In simple words: Maharashtra has food irradiation plants at Lasalgaon for onions and potatoes, and at Navi Mumbai for spices and condiments, to extend their shelf life.

🎯 Exam Tip: Recognize important locations of food processing and preservation facilities within the state.

Question 9. .................... found the pasteurisation method.
Answer: Louis Pasteur
In simple words: Louis Pasteur was the scientist who discovered the pasteurization method, revolutionizing food preservation.

🎯 Exam Tip: Associate key scientific discoveries with the scientists who made them.

Question 10. .................... adulterant is added to turmeric powder.
Answer: Metanyl yellow
In simple words: Metanyl yellow is a common, harmful adulterant added to turmeric powder to enhance its color.

🎯 Exam Tip: Be aware of specific adulterants for common food items like turmeric powder.

Question 11. .................... adulterant is added to red chilly powder.
Answer: Brickdust
In simple words: Brickdust is an adulterant sometimes added to red chilly powder to increase its weight and color.

🎯 Exam Tip: Learn common adulterants for spices and how to identify them.

Question 12. .................... is used to make fruits more attractive.
Answer: calcium carbide
In simple words: Calcium carbide is illegally used to artificially ripen fruits, making them appear more attractive quickly.

🎯 Exam Tip: Understand chemicals used for artificial ripening and their potential dangers.

Question 13. .................... and .................... harmful chemicals are mixed with cold drinks.
Answer: carbonated soda, phosphoric acid
In simple words: Harmful chemicals like excess carbonated soda and phosphoric acid are often mixed into cold drinks.

🎯 Exam Tip: Identify common harmful chemicals found in processed foods and beverages.

Question 14. Shopkeepers change the of the .................... food packets fo avoid a financial loss.
Answer: expiry date
In simple words: Shopkeepers sometimes illegally alter the expiry dates on food packets to avoid financial losses from unsold items.

🎯 Exam Tip: Be aware of unethical practices by shopkeepers, such as tampering with expiry dates, that can compromise food safety.

Question 15. Milk vendors add .................... to the milk to appear as higher fat content.
Answer: urea
In simple words: Milk vendors sometimes add urea to milk, which can artificially increase its apparent fat content and density.

🎯 Exam Tip: Understand the deceptive practices used in food adulteration, like adding urea to milk.

Question 16. The shelf life of potatoes and onions .................... due to slowed-down of sprouting.
Answer: increases
In simple words: When sprouting in potatoes and onions is slowed down, their shelf life naturally increases.

🎯 Exam Tip: Relate methods that inhibit natural processes (like sprouting) to the extension of shelf life for food products.

Question 17. Serving too much food to guests at traditional feasts and banquets leads to .................... wastage of food.
Answer: Quantitative
In simple words: Serving excessive amounts of food at gatherings typically results in quantitative food wastage, where edible food is simply thrown away.

🎯 Exam Tip: Differentiate between quantitative (excess amount) and qualitative (quality deterioration) food wastage.

Question 18. Miscalculation of the time required to transport food from producers to consumers leads to .................... wastage of food.
Answer: Qualitative
In simple words: Poor planning of transport time for food often leads to qualitative wastage, as the food's quality degrades before it reaches consumers.

🎯 Exam Tip: Understand how logistical issues, like transport timing, primarily affect the quality, leading to qualitative wastage.

Question 19. Prevention of food spoilage by microbial growth and infestation by pests is called ....................
Answer: food protection
In simple words: Food protection refers to all measures taken to prevent food from spoiling due to microbial growth or pest infestation.

🎯 Exam Tip: Define key terms related to food safety and preservation accurately.

Question 20. .................... is an example of a chemical preservative.
Answer: Sodium benzoate.
In simple words: Sodium benzoate is a commonly used chemical preservative, especially in acidic foods, to inhibit the growth of bacteria and fungi.

🎯 Exam Tip: Be able to give specific examples of chemical preservatives.

Say Whether True Or False,, Correct And Rewrite The False Statement.

Question 1. To prevent adulteration of food, it is inspected by the "Food and Drug Administration department of the government”.
Answer: True
In simple words: The Food and Drug Administration (FDA) is a governmental body responsible for inspecting food to prevent adulteration and ensure safety.

🎯 Exam Tip: Understand the role of regulatory bodies in ensuring food safety and preventing adulteration.

Question 2. Overcooking of food increases the quality of food.
Answer: False. Over cooking of food spoils it
In simple words: Overcooking actually degrades the quality of food, often spoiling its texture, nutrients, and taste, rather than enhancing it.

🎯 Exam Tip: Be able to identify common misconceptions about cooking and food quality.

Question 3. Peanuts become rancid then, it is not good to eat.
Answer: True
In simple words: Rancid peanuts have undergone oxidative spoilage, resulting in an unpleasant taste and odor, making them unfit for consumption.

🎯 Exam Tip: Know what "rancid" means in the context of food spoilage and why such food is unsafe.

Question 4. Oil and ghee contain fats.
Answer: True
In simple words: Both oil and ghee are primarily composed of fats, serving as concentrated sources of energy.

🎯 Exam Tip: Understand the basic nutritional composition of common food items.

Question 5. Prevention of food spoilage by microbial growth and infestation by pests is called food wastage.
Answer: False. Prevention of food spoilage by microbial growth and infestation by pests is called food protection.
In simple words: Preventing food spoilage from microbes and pests is termed food protection, not food wastage, as it aims to preserve food, not discard it.

🎯 Exam Tip: Clearly differentiate between the concepts of food protection and food wastage.

Question 6. Serve yourself only as much as you can eat.
Answer: True
In simple words: Serving yourself only what you can eat is a good practice to prevent food wastage and promote responsible consumption.

🎯 Exam Tip: Advocate for practical actions that reduce food waste at an individual level.

Question 7. Salt, sugar and oil are naturally available preservatives.
Answer: True
In simple words: Salt, sugar, and oil are indeed natural substances widely used as preservatives due to their ability to inhibit microbial growth and oxidation.

🎯 Exam Tip: Identify common natural substances that double as effective food preservatives.

Question 8. Pickles can be preserved by salting.
Answer: True
In simple words: Salting is an effective traditional method for preserving pickles by drawing out moisture and creating an unfavorable environment for microbial growth.

🎯 Exam Tip: Recognize traditional food preservation methods and their underlying principles.

Question 9. Milk vendors add urea to the milk so that it appears to have higher fat content.
Answer: True
In simple words: Some milk vendors illegally add urea to milk to falsely increase its perceived fat content and density.

🎯 Exam Tip: Be aware of specific adulterants like urea used in milk and their intended deceptive effect.

Question 10. Shelf life of fruits and vegetables decreases by gamma rays emitted by radio-active isotopes.
Answer: False. Shelf life of fruits and ' vegetables increases by gamma rays emitted by radioactive isotopes.
In simple words: Gamma ray irradiation actually increases the shelf life of fruits and vegetables by destroying spoilage-causing microorganisms and inhibiting ripening, contrary to decreasing it.

🎯 Exam Tip: Understand that irradiation is a preservation technique designed to extend, not decrease, shelf life.

Give Scientific Reasons.

Question 1. Refrigerators are used in the kitchen.
Answer:
1. Biological and chemical reactions in food materials are slowed down at low temperature.
2. As a result food remains in good condition for a longer period. Therefore refrigerators are used in the kitchen.
In simple words: Refrigerators are used in kitchens because their low temperature slows down the biological and chemical reactions in food, thereby preserving its quality and extending its shelf life.

🎯 Exam Tip: Explain both the direct effect (slowing reactions) and the consequence (longer preservation) when discussing refrigeration.

Question 2. Potatoes and onions are treated with gamma rays.
Answer: Potatoes and onions are treated with gamma rays because irradiation with gamma rays prevents their wastage due to sprouting and increases their shelf life.
In simple words: Gamma ray treatment for potatoes and onions prevents sprouting, significantly reducing wastage and increasing their shelf life.

🎯 Exam Tip: Link the specific treatment (gamma rays) to its precise effect (preventing sprouting) and benefit (increased shelf life).

Question 3. Grains are sun-dried.
Answer: Grains are sun-dried to preserve them because on sun drying their water content gets reduced and hence they last longer.
In simple words: Grains are sun-dried to remove their moisture content, which prevents spoilage by inhibiting microbial growth and extending their storage duration.

🎯 Exam Tip: Focus on the removal of moisture as the primary reason for sun-drying grains for preservation.

Question 4. We boil milk from time to time.
Answer: We boil milk from time to time to kill microorganisms in it and thus prevent it from getting spoilt.
In simple words: Milk is boiled periodically to kill harmful microorganisms present in it, thereby preventing spoilage and keeping it safe for consumption.

🎯 Exam Tip: Connect the action of boiling to its effect on microorganisms and the prevention of spoilage.

Question 5. Jams or pickles get spoilt if their jars are not sealed properly.
Answer: If the jar is not sealed properly, micro-organisms from the air enter in the jar and start growing on the food. Oxygen in the air helps the micro-organisms and fungi to grow faster and hence bring about the spoilage of the jams and pickles.
In simple words: Jams and pickles spoil if jars are not sealed correctly because air, carrying microorganisms and oxygen, enters, promoting rapid growth of microbes and fungi that cause spoilage.

🎯 Exam Tip: Explain the dual role of improper sealing: allowing entry of microbes and providing oxygen for their growth.

Question 6. Some vendors add urea to the milk.
Answer: Some vendors add urea to the milk so that it appears to have higher fat content.
In simple words: Urea is added to milk by some vendors to artificially enhance its appearance of higher fat content and density, deceiving consumers.

🎯 Exam Tip: State the deceptive purpose behind adding adulterants like urea to milk.

Question 7. Food wastage should be avoided.
Answer: In countries like India, the food requirement is plenty and people do not get proper meals even once in a day. If food is not wasted then it could have met the need of many others. Therefore, food should not be wasted and proper measures should be implemented to stop quantitative and qualitative wastage of food.
In simple words: Food wastage should be avoided because in many places, including India, there are people who lack adequate meals, and reducing waste could help meet their nutritional needs and promote food security.

🎯 Exam Tip: Highlight the ethical and societal reasons (food scarcity, hunger) for avoiding food wastage.

Question 8. Adulterated food should not be consumed.'
Answer:
1. The health of all people is endangered by food adulteration.
2. Different types of adulterants affect our health in different ways.
3. Some adulterants cause abdominal discomfort or poisoning, while some may affect the functioning of some organs if consumed over a long period of time or even cause cancer.
In simple words: Adulterated food should not be consumed because it poses various health risks, from immediate discomfort and poisoning to long-term issues like organ damage and cancer, endangering overall public health.

🎯 Exam Tip: Emphasize the range of health hazards (short-term and long-term) associated with consuming adulterated food.

Can You Tell?

Answer the following questions:

Question 1. How and where food is wasted?
Answer: Quantitative wastage of food: 1. Wrong methods of farming like hand sowing of, ts seeds, inadequate threshing, improper storage and wrong methods of distribution are some reasons for quantitative wastage of food. 2. Besides, much food is wasted as a result of the custom of offering and serving too much food to guests at traditional feasts or banquets. 3. Had it not been wasted, all this food could have met the need of many others Qualitative wastage of food: Using wrong methods of protecting food, excessive use of food preservatives, over-cooking, washing the vegetables after cutting them, mis-handling of fruits like grapes and mangoes, mis-calculation of the time required to transport food from producers to consumers, are some of the causes of quantitative wastage of food.
In simple words: Food is wasted quantitatively through inefficient farming, poor storage, and over-serving at events, and qualitatively through improper preservation, over-cooking, or mishandling during transport.

🎯 Exam Tip: Understanding both quantitative and qualitative aspects of food wastage is crucial for comprehensive answers, often requiring examples for each type.

Question 2. How is the food adulterated?
Answer: Food is adulterated by the following ways: 1. Removal of some important components of food. e.g. removal of fat content of milk, essence of cloves, cardamoms, etc. 2. Mixing of a low quality inedible or cheaper material or harmful colour with food. 3. Mixing of some harmful materials like small stones, fine sand, iron filings, urea, dung of horse, sawdust etc.
In simple words: Food adulteration involves removing essential nutrients, adding low-quality or harmful substances, or mixing in inedible materials to increase quantity or reduce cost.

🎯 Exam Tip: When explaining food adulteration, it's important to differentiate between the various methods, such as removal of components versus addition of foreign substances, and to provide clear examples for each.

How Will You Find Out If Food Has Been Adulterated?
Answer: The following table illustrates methods to detect common food adulterants:

In simple words: Simple tests like checking milk's spread, sediment in chili powder, color change in turmeric with acid, or magnetic attraction in rava can help identify common food adulterants.

🎯 Exam Tip: When detailing food adulteration tests, describe the procedure clearly, identify the expected adulterant, and explain the conclusive observation for each food item.