NCERT Class 12 Home Science Manav Paristhitik avam Parivar Vigyan Bhag 1: Chapter 3 — अध् यायय 3
This chapter, 'Public Nutrition and Health,' from NCERT's Class 12 Home Science book (Manav Paristhitik avam Parivar Vigyan Bhag 1), focuses on the critical importance of public nutrition and its role in overall health. It aims to help students understand the significance and scope of public nutrition, gain knowledge about nutritional problems affecting public health, and become aware of government programs addressing these issues. The chapter highlights the severe consequences of malnutrition, including low birth weight, stunted growth, and micronutrient deficiencies, which impact physical, mental, and cognitive development. It also touches upon the rising problem of overnutrition due to lifestyle changes and dietary habits. Understanding these concepts is crucial for students to contribute to national development and economic growth by addressing malnutrition effectively.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 12 |
| Subject | Home Science |
| Book | Manav Paristhitik avam Parivar Vigyan Bhag 1 |
| Chapter | Chapter 3 — अध् यायय 3 |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 4 minutes |
| Word count | 618 |
Learning outcomes
- Understand the importance and scope of public nutrition.
- Gain knowledge of nutritional problems affecting public health.
- Become aware of ongoing government programs to combat nutritional issues.
Vocabulary
| Word | Meaning |
|---|---|
| Malnutrition | A condition resulting from deficiency, excess, or imbalance of energy and/or nutrients. |
| Overnutrition | Excessive intake of nutrients, often leading to obesity and related health problems. |
| Public Health | The science and art of preventing disease, prolonging life, and promoting health through organized community efforts. |
| Micronutrient deficiencies | Lack of essential vitamins and minerals required in small amounts for proper growth and development. |
| Stunting | Impaired growth and development resulting from chronic malnutrition, often seen in children. |
The complete chapter text is read in the official NCERT PDF viewer below (streamed from ncert.nic.in). This page provides NCERT Help study material — summary, vocabulary, practice questions, and FAQs — not a full reproduction of the textbook.
Read chapter online
This PDF is loaded from the official NCERT website (ncert.nic.in). Use the page buttons below to read — download is disabled on NCERT Help.
Read page by page below. PDF is streamed from the official NCERT website — no download button on this page.
Practice questions
- What is the primary goal of public health nutrition? Answer: To prevent and manage both malnutrition and overnutrition, and maintain optimal nutrition levels for the population.
- What are some common micronutrient deficiencies mentioned in the chapter? Answer: Iron, zinc, Vitamin A, Vitamin C, Vitamin D, iodine, folic acid, and Vitamin B12.
- How does malnutrition impact a child's development? Answer: It affects physical growth, leading to stunting, and can also impair mental and cognitive development.
- What lifestyle changes contribute to overnutrition? Answer: Reduced physical activity, reliance on fast transport, less walking, and changes in dietary patterns towards processed and unhealthy foods.
Practice MCQs
Q1. What percentage of deaths in children under five are attributed to malnutrition?
Explanation: The chapter states that at least 50 percent of deaths in children under five are caused by malnutrition.
Q2. Low birth weight is defined as a weight less than:
Explanation: The text defines low birth weight as babies weighing less than 2500 g (or 2.5 kg) at birth.
Q3. Which of the following is NOT listed as a significant micronutrient deficiency?
Explanation: Calcium is not explicitly mentioned among the most important micronutrient deficiencies listed in the chapter; Iron, Vitamin B12, and Iodine are.
Q4. The chapter suggests that malnutrition can lead to a loss of productivity equivalent to:
Explanation: Experts estimate that malnutrition causes a loss in productivity exceeding 10% of lifelong earnings.
Q5. Which of these is an example of a processed or less healthy food option mentioned?
Explanation: Burgers are mentioned as an example of processed, less healthy, or Westernized food options that contribute to overnutrition.
Frequently asked questions
What is the definition of public health nutrition?
Public health nutrition aims to protect and promote the health of all people through organized community efforts, focusing on preventing and managing nutritional problems like malnutrition and overnutrition.
What are the main nutritional challenges discussed in the chapter for India?
The chapter highlights widespread malnutrition, including low birth weight and stunting, as well as micronutrient deficiencies. It also notes the growing problem of overnutrition due to changing lifestyles and diets.
How does malnutrition affect a nation's economy?
Malnutrition leads to significant economic losses through reduced productivity, estimated to be over 10% of lifelong earnings for individuals and 2-3% of the national GDP.
What are the consequences of micronutrient deficiencies?
These deficiencies can impair physical growth (leading to shorter stature in adults) and negatively affect mental and cognitive development, ultimately impacting life productivity and quality.
What factors are contributing to the rise of overnutrition in India?
Changing lifestyles with reduced physical activity, increased reliance on fast transport, and dietary shifts towards processed, fried, and less healthy food options are contributing factors.
Related resources
Important topics
Topics covered
NCERT Class 12 Home Science — Manav Paristhitik avam Parivar Vigyan Bhag 1 — Chapter 3 — अध् यायय 3. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.