CBSE Class 12 Sociology (2026–27)
Chapter 2: Demographic Structure of Indian Society
20 Important Questions and Answers
Demographic structure refers to the composition of a population in terms of age, sex, literacy, occupation, and residence. The chapter covers demography, population theories, demographic indicators, population composition, and population policy in India.
1. What is Demography? Explain its importance.
Answer:
Demography is the systematic study of population. It examines population size, distribution, composition, and changes caused by birth, death, and migration. The term comes from the Greek words demos (people) and graphein (to describe). Demography is important because it helps governments formulate policies related to health, education, employment, housing, and social welfare. It also enables sociologists to understand social changes and population trends. Census data and surveys provide essential demographic information. By studying demographic patterns, policymakers can identify social problems and plan developmental programmes effectively. Thus, demography is a vital tool for understanding society and its future needs.
2. Distinguish between Formal Demography and Social Demography.
Answer:
Formal demography focuses on the statistical and mathematical study of population. It deals with quantitative aspects such as population size, birth rate, death rate, fertility rate, and migration patterns. Social demography, on the other hand, studies the social, economic, political, and cultural factors influencing population trends. It examines how education, poverty, healthcare, gender relations, and social institutions affect demographic behaviour. While formal demography relies heavily on numerical data and calculations, social demography interprets these figures in a broader social context. Both approaches complement each other and help in understanding population dynamics comprehensively.
3. Explain the Malthusian Theory of Population.
Answer:
The Malthusian Theory was proposed by Thomas Robert Malthus. According to him, population grows geometrically (2, 4, 8, 16), whereas food production increases arithmetically (2, 4, 6, 8). As a result, population growth would eventually exceed food supply, causing poverty, famine, disease, and starvation. Malthus believed that natural checks such as epidemics and wars would control population growth. He also advocated preventive checks like late marriages and moral restraint. Although criticised for underestimating technological progress and agricultural development, the theory remains significant because it highlighted concerns regarding population growth and resource availability.
4. What is the Theory of Demographic Transition?
Answer:
The Theory of Demographic Transition explains changes in population growth as societies develop economically. It has three stages. In the first stage, both birth and death rates are high, resulting in slow population growth. In the second stage, death rates decline due to improvements in healthcare and sanitation, while birth rates remain high, causing rapid population growth. In the third stage, both birth and death rates become low, leading to population stability. The theory shows how modernization influences demographic patterns. India is considered to be moving through the later stages of demographic transition.
5. What is Census? Why is it important?
Answer:
A census is the official and systematic collection of information about the population of a country. In India, the census is generally conducted every ten years. It gathers data regarding age, sex, literacy, occupation, religion, language, and place of residence. Census information is essential for planning development programmes and allocating resources effectively. It helps governments identify population trends and social needs. Researchers, policymakers, and sociologists use census data to study demographic changes and social conditions. Accurate census data supports informed decision-making and promotes balanced regional development. Thus, the census is a crucial source of demographic information.
6. Define Birth Rate and Death Rate.
Answer:
Birth rate refers to the number of live births per 1,000 people in a population during a particular year. It indicates the level of fertility and population growth. Death rate refers to the number of deaths per 1,000 people in a population during a year. It reflects health conditions, medical facilities, nutrition, and living standards. Together, birth rate and death rate help determine the rate of natural increase in population. These indicators are widely used by demographers to analyse population trends and predict future demographic changes. They are important tools for planning public health and development policies.
7. What is Fertility Rate?
Answer:
Fertility rate refers to the number of live births per 1,000 women of reproductive age, usually between 15 and 49 years. It measures the reproductive performance of women in a society. Demographers often use the Total Fertility Rate (TFR), which indicates the average number of children a woman is expected to have during her lifetime. Fertility rates are influenced by factors such as education, healthcare, urbanization, employment opportunities, and cultural beliefs. A declining fertility rate generally indicates social and economic development. Fertility data helps governments formulate policies related to population stabilization and family welfare.
8. What is Infant Mortality Rate (IMR)?
Answer:
Infant Mortality Rate (IMR) refers to the number of infants who die before reaching one year of age per 1,000 live births in a given year. It is an important indicator of a country’s health and development status. High IMR often reflects poor healthcare services, malnutrition, inadequate sanitation, and poverty. Low IMR indicates better medical facilities and improved living conditions. Governments use IMR data to assess the effectiveness of maternal and child healthcare programmes. Reducing infant mortality remains a major objective of public health policies in developing countries, including India.
9. What is Life Expectancy?
Answer:
Life expectancy refers to the average number of years a person is expected to live based on current mortality conditions. It is a significant demographic indicator that reflects the overall health and quality of life in a society. Improvements in healthcare, nutrition, sanitation, and education generally increase life expectancy. A higher life expectancy suggests better living standards and effective public health systems. Governments and policymakers use life expectancy data to plan healthcare services and social security programmes. In India, life expectancy has increased considerably due to advances in medical science and public health initiatives.
10. What is Sex Ratio?
Answer:
Sex ratio refers to the number of females per 1,000 males in a population. It is an important indicator of gender equality and social development. A balanced sex ratio reflects equal opportunities and better status for women. In India, concerns have been raised about declining child sex ratios due to gender discrimination, son preference, and sex-selective practices. Government programmes such as Beti Bachao Beti Padhao aim to improve the situation. Monitoring sex ratio helps identify gender-related issues and formulate policies promoting women’s welfare and empowerment. Thus, sex ratio is a vital measure of demographic and social health.
11. What is Age Structure?
Answer:
Age structure refers to the distribution of a population among different age groups. It is commonly divided into children, working-age adults, and elderly persons. Age structure helps determine the economic and social needs of a society. A large proportion of young people indicates future workforce potential, while a large elderly population may require greater healthcare and social security services. Demographers use age pyramids to represent age structure visually. Understanding age composition is essential for planning education, employment, healthcare, and welfare programmes. Therefore, age structure plays a significant role in demographic analysis and development planning.
12. What is Dependency Ratio?
Answer:
Dependency ratio is the ratio of dependent people to the working-age population. Dependents usually include children below 15 years and elderly people above 64 years. A high dependency ratio means fewer workers are supporting more dependents, which can place economic pressure on society. A low dependency ratio indicates a larger productive workforce. Governments use dependency ratio data to plan employment, healthcare, pensions, and social welfare programmes. This indicator helps assess the economic burden on the working population and the overall demographic health of a country.
13. What is Demographic Dividend?
Answer:
Demographic dividend refers to the economic advantage that arises when the working-age population becomes larger than the dependent population. This situation provides opportunities for increased productivity, economic growth, and national development. India is often considered to have a demographic dividend because of its large youth population. However, to benefit fully, the country must invest in education, skill development, healthcare, and employment generation. Without adequate opportunities, the demographic dividend may become a demographic burden. Therefore, effective policies are necessary to convert the youthful population into a productive workforce.
14. Explain the concept of Population Explosion.
Answer:
Population explosion refers to a rapid and uncontrolled increase in population over a short period. It usually occurs when death rates decline significantly while birth rates remain high. Population explosion can create pressure on resources such as food, housing, healthcare, education, and employment. It may also contribute to environmental degradation and poverty. In India, rapid population growth during the twentieth century raised concerns about sustainable development. Family planning programmes, improved education, and awareness campaigns have been introduced to address this issue. Managing population growth remains an important challenge for developing countries.
15. What are Rural–Urban Differences in Population?
Answer:
Rural and urban populations differ in occupation, literacy, healthcare access, and lifestyle. Rural areas are mainly dependent on agriculture and generally have lower population density. Urban areas offer greater employment opportunities, better educational institutions, advanced healthcare facilities, and higher literacy rates. Migration from villages to cities occurs due to the search for jobs and improved living conditions. Urbanization has increased significantly in India, leading to the growth of towns and cities. Understanding rural–urban differences helps policymakers address regional inequalities and ensure balanced development across the country.
16. Why is Migration important in Demography?
Answer:
Migration refers to the movement of people from one place to another, either temporarily or permanently. It is an important demographic process because it affects population size, distribution, and composition. Migration may occur due to employment opportunities, education, marriage, natural disasters, or social reasons. Rural-to-urban migration contributes to urbanization and economic growth. However, excessive migration can create pressure on housing, transport, and public services in cities. Studying migration helps governments understand population movements and develop policies for regional development and urban planning.
17. What are Population Pyramids?
Answer:
Population pyramids are graphical representations showing the age and sex composition of a population. They help demographers understand demographic patterns and future trends. A broad-based pyramid indicates a young and growing population, while a narrow base suggests declining birth rates. A rectangular pyramid represents a stable population. Population pyramids are useful for planning education, healthcare, employment, and social welfare programmes. They also help compare demographic characteristics between regions and countries. Therefore, population pyramids serve as an effective visual tool for analysing demographic structure.
18. What are the objectives of Population Policy in India?
Answer:
Population Policy in India aims to achieve population stabilization while improving the quality of life. Its objectives include reducing birth rates, promoting family planning, improving maternal and child health, increasing literacy, and ensuring access to healthcare services. The policy also seeks to reduce infant and maternal mortality rates and encourage responsible parenthood. Through awareness campaigns and welfare programmes, the government promotes small family norms. Population policy contributes to sustainable development by balancing population growth with available resources and economic opportunities.
19. Why is Literacy an important demographic indicator?
Answer:
Literacy is an important demographic indicator because it reflects the educational level and social development of a population. Higher literacy rates are associated with better employment opportunities, improved health awareness, lower fertility rates, and greater gender equality. Literacy empowers individuals to participate effectively in economic and social activities. Governments use literacy data to identify educational gaps and formulate policies for inclusive development. In India, literacy rates have increased significantly, contributing to social progress and economic growth. Thus, literacy is a key measure of human development and demographic advancement.
20. Why is the study of Demography important for Sociology?
Answer:
Demography is closely related to sociology because population changes influence social structures and institutions. Demographic data helps sociologists analyse issues such as migration, urbanization, family change, ageing, gender inequality, and employment. Understanding population trends enables researchers to examine how social and economic factors affect people’s lives. Demography provides reliable statistical information that supports sociological research and policymaking. It helps explain social transformations and predict future challenges. Therefore, the study of demography is essential for understanding society, planning development, and improving the quality of life of citizens.