Chapter 15 — India: Population, Transport, Communication and Trade: Exercise Solutions Guide
How to Use This Page
1. Read the textbook chapter first. This guide supplements the Samacheer Kalvi textbook — it does not replace it. 2. Try each exercise question on your own before checking the answer. 3. Use the Key Concepts section for a quick 10-minute recap before exams. 4. Memorise the one-mark MCQ answers first, then move to short and detailed answers. 5. Practise map work — locate major ports, highways, and densely populated states on an outline map of India. 6. Tick off the Exam Checklist at the end to confirm you have covered every question type.
Key Concepts (Quick Recap)
Population
- India's population: approximately 1.4 billion (2023 estimate); 2nd most populous country after China.
- Census conducted every 10 years; the latest completed Census was 2011 (population: 1.21 billion). The 2021 Census was delayed.
- Population density (2011): 382 persons per sq km — India is one of the most densely populated large countries.
- Sex ratio (2011): 943 females per 1,000 males.
- Literacy rate (2011): 74.04% (male: 82.14%, female: 65.46%).
- Growth rate (2001–2011): 17.7% — a decline from 21.5% in the previous decade.
Population Distribution and Density
| Category | States / Regions | Density (approx.) |
|---|---|---|
| Very high density | Bihar (1,102), West Bengal (1,029), Kerala (859), Uttar Pradesh (828) | >800/sq km |
| Moderate density | Tamil Nadu (555), Karnataka (319), Maharashtra (365) | 300–600/sq km |
| Low density | Arunachal Pradesh (17), Mizoram (52), Sikkim (86), Nagaland (119) | <150/sq km |
Factors affecting population distribution: relief (plains favour settlement), climate (moderate climate attracts people), availability of water, fertile soil, mineral resources, industrial development, transport facilities, and urbanisation.
Transport
| Mode | Key Facts |
|---|---|
| Roadways | Most extensive network; ~66 lakh km total road length; carries ~85% of passenger traffic; NHAI manages National Highways |
| Railways | Longest network in Asia; ~68,000 km route length; introduced 1853 (Mumbai–Thane); carries bulk freight and long-distance passengers |
| Waterways | Cheapest for heavy goods; 5 National Waterways declared; important: NW-1 (Ganga), NW-2 (Brahmaputra), NW-3 (West Coast Canal) |
| Airways | Fastest but costliest; IGI Delhi, CSI Mumbai, Chennai, Kempegowda Bengaluru are major international airports; AAI manages airports |
National Highways: Connect state capitals, major ports, and industrial centres. The Golden Quadrilateral (5,846 km) connects Delhi–Mumbai–Chennai–Kolkata. NHDP (National Highways Development Project) oversees upgrades.
Major Ports: Mumbai, Chennai, Kolkata (including Haldia), Kochi, Visakhapatnam, Tuticorin, Kandla, Mangalore, Paradip, Ennore. India has 12 major ports and ~200 minor ports.
Communication
- Postal network: Largest in the world (~1,55,000 post offices); PIN code system introduced in 1972.
- Telecom: Over 1.1 billion telephone connections; TRAI regulates telecom sector.
- Internet: Rapid growth; India has the 2nd largest internet user base globally.
- Mass media: Doordarshan (TV) and All India Radio (AIR) reach remote areas; Prasar Bharati is the public broadcaster.
Trade
- Internal trade: Exchange of goods within the country — between states, between rural and urban areas.
- International trade: Exchange of goods between nations; measured by balance of trade (exports minus imports).
- Major exports: Engineering goods, gems and jewellery, textiles and garments, IT/software services, petroleum products, pharmaceuticals, agricultural products (tea, spices, rice).
- Major imports: Petroleum and crude oil, gold and precious metals, electronic goods, machinery, coal, fertilisers.
- Trade balance: India generally runs a trade deficit (imports exceed exports).
- Major trade partners: USA, China, UAE, Saudi Arabia, Iraq, Germany, Hong Kong.
I. Choose the Correct Answer (MCQs)
II. Fill in the Blanks
1. India is the second most populous country in the world. — After China; expected to become the most populous by 2030.
2. The Census in India is conducted every ten years. — The first Census was held in 1872; the first synchronous Census in 1881.
3. The population density of India as per the 2011 Census is 382 persons per square kilometre.
4. The Golden Quadrilateral connects Delhi, Mumbai, Chennai, and Kolkata. — Total length: ~5,846 km.
5. The first railway line in India ran between Mumbai and Thane in the year 1853.
6. Roadways carry the highest share of passenger traffic in India.
7. India's largest international airport by passenger traffic is Indira Gandhi International (IGI) Airport, Delhi.
8. The body that regulates telecommunications in India is TRAI (Telecom Regulatory Authority of India).
9. India's major import item by value is petroleum (crude oil and products).
10. The balance of trade is calculated as exports minus imports. — A negative balance means the country imports more than it exports (trade deficit).
III. True or False
IV. Match the Following
Set A
| Column A | Column B |
|---|---|
| 1. First railway line | (c) 1853, Mumbai–Thane |
| 2. Golden Quadrilateral | (e) Delhi–Mumbai–Chennai–Kolkata |
| 3. NW-1 | (a) Ganga river (Allahabad–Haldia) |
| 4. Least dense state | (d) Arunachal Pradesh |
| 5. TRAI | (b) Telecom regulator |
Set B
| Column A | Column B |
|---|---|
| 1. Census 2011 population | (d) 1.21 billion |
| 2. Density of India (2011) | (e) 382 persons/sq km |
| 3. Most populous state | (a) Uttar Pradesh |
| 4. Prasar Bharati | (c) Public broadcaster (AIR + Doordarshan) |
| 5. Major import | (b) Petroleum crude |
Set C
| Column A | Column B |
|---|---|
| 1. IGI Airport | (e) Delhi |
| 2. Kochi port | (c) Kerala |
| 3. NHDP | (a) National Highways Development Project |
| 4. Sex ratio (2011) | (d) 943 females per 1,000 males |
| 5. Cheapest transport | (b) Waterways |
V. Very Short Answers
VI. Short Answers
VII. Detailed Answers
1. Describe the patterns of population distribution and density in India. Explain the factors responsible.
Introduction: India's population is unevenly distributed across its 3.28 million sq km area. While the national average density is 382 persons/sq km (2011), the range varies from 17 (Arunachal Pradesh) to 1,102 (Bihar).
Regional patterns:
| Region | Density Character | Examples |
|---|---|---|
| Northern Plains (Ganga–Brahmaputra) | Very high | UP (828), Bihar (1,102), West Bengal (1,029) |
| Peninsular Plateau | Moderate | Maharashtra (365), Karnataka (319), Telangana (312) |
| Coastal areas | Moderate to high | Kerala (859), Tamil Nadu (555), Goa (394) |
| Mountainous / NE states | Low | Arunachal Pradesh (17), Mizoram (52), Sikkim (86) |
| Desert / Arid | Low to moderate | Rajasthan (200) — varied; Thar region sparse |
Factors responsible:
1. Geographical factors: Fertile alluvial plains, reliable monsoon rainfall, and perennial rivers attract dense settlement. Rugged mountains, dense forests, and arid deserts discourage habitation. 2. Economic factors: Industrial corridors (Mumbai–Pune, Delhi–NCR, Bengaluru–Chennai), mining belts, and IT hubs draw migrant workers and professionals. 3. Historical factors: The Indo-Gangetic plain has supported settled agriculture for millennia, building up high population over centuries. 4. Infrastructure: Regions with better roads, railways, ports, and communication develop faster and attract more people. 5. Social factors: Urbanisation and migration from rural to urban areas create high city densities; states with better education and health infrastructure see greater in-migration.
Conclusion: Population distribution in India is the combined result of physical geography, economic opportunity, and historical settlement patterns. Understanding these patterns is essential for planning resource allocation and regional development.
2. Compare the four modes of transport in India — roadways, railways, waterways, and airways.
| Feature | Roadways | Railways | Waterways | Airways |
|---|---|---|---|---|
| Network length | ~66 lakh km (largest) | ~68,000 km route | ~14,500 km navigable | ~130 operational airports |
| Cost of construction | Low per km | High | Very low (uses natural routes) | Very high |
| Cost of transport | Moderate | Low for bulk freight | Cheapest for heavy goods | Most expensive |
| Speed | Moderate | Fast (long-distance) | Slowest | Fastest |
| Suitability | Short to medium distance; door-to-door | Long distance; bulk freight & passengers | Heavy, bulky, non-perishable goods | High-value, perishable, time-sensitive |
| Passenger share | ~85% | ~15% | Negligible | <1% (but growing) |
| Freight share | ~65% | ~30% | ~5% | Negligible |
| Geographical reach | Every village possible | Limited to rail routes | Limited to navigable rivers/canals/coasts | Limited to airports and nearby areas |
| Limitations | Congestion, accidents, weather | Fixed routes, transshipment needed | Slow, seasonal (monsoon affects rivers) | Very costly, weather-dependent |
| Key development | Golden Quadrilateral, Bharatmala | Dedicated Freight Corridors, Kavach | NW-1, NW-2, NW-3 declared | UDAN (regional connectivity) |
Conclusion: Each mode has distinct advantages. Roadways dominate for flexibility and reach; railways for cost-effective long-distance and bulk freight; waterways for cheapest heavy-goods transport; and airways for speed and high-value cargo. A well-integrated multimodal transport system is essential for India's economic growth.
3. Explain India's international trade — major exports, imports, and the balance of trade.
Introduction: International trade is the exchange of goods and services between countries. It is a key indicator of economic strength and integration with the global economy.
Major exports of India:
| Export Category | Details |
|---|---|
| Engineering goods | Machinery, transport equipment, iron/steel products — largest export category |
| Gems and jewellery | Cut diamonds, gold jewellery — India is a global polishing hub |
| Textiles and garments | Cotton, handloom, readymade garments — major employment generator |
| IT and software services | BPO, software development — India is the world's largest IT services exporter |
| Petroleum products | Refined petroleum from Reliance, IOC, BPCL refineries |
| Pharmaceuticals | Generic drugs, vaccines — India is the "pharmacy of the developing world" |
| Agricultural products | Basmati rice, tea, spices, cashew nuts |
Major imports of India:
| Import Category | Details |
|---|---|
| Petroleum and crude oil | Over 80% of crude oil needs are met through imports |
| Gold and precious metals | High consumer demand for jewellery and investment |
| Electronic goods | Smartphones, semiconductors, consumer electronics |
| Machinery | Capital goods, industrial machinery from China, Japan, Germany |
| Coal | Coking coal for steel plants; thermal coal for power |
| Fertilisers | Urea, DAP for agriculture |
Balance of trade: India typically runs a trade deficit — the value of imports exceeds exports. The deficit is partly offset by invisible earnings from IT services, remittances from NRIs, and tourism, which help the current account balance.
Major trade partners: USA (largest export destination), China (largest import source), UAE, Saudi Arabia, Iraq, Germany, Hong Kong, Singapore.
Conclusion: India's trade profile reflects its industrial strengths (IT, textiles, pharma, gems) and its structural dependency on imported energy (petroleum, coal). Diversifying exports and reducing import dependency are ongoing policy goals.
4. Describe the communication networks in India and their significance for development.
Introduction: Communication is the exchange of information, ideas, and messages. India's communication infrastructure includes postal services, telecommunications, internet, and mass media.
5. Explain the relationship between transport and economic development in India.
Introduction: Transport is the backbone of economic activity. It connects producers to markets, workers to workplaces, and raw materials to factories.
Key relationships:
1. Agriculture: Roads and railways transport fertilisers, seeds, and equipment to farms; carry harvested crops to markets and food-processing units. Without transport, agricultural surplus would rot in villages. 2. Industry: Factories need raw materials (coal, iron ore, cotton) and must ship finished goods. Efficient transport reduces production costs and delivery times, making Indian goods competitive globally. 3. Trade: Both internal and international trade depend entirely on transport. Ports, highways, and railways enable import of essential goods and export of manufactured products. 4. Employment: The transport sector itself employs millions — truck drivers, railway staff, port workers, airline crew, and logistics professionals. 5. Regional development: Well-connected regions attract investment and industries, creating jobs and reducing poverty. Isolated regions remain underdeveloped. Example: the NE states lag partly due to poor connectivity. 6. Urbanisation: Transport corridors (Delhi Metro, Mumbai suburban rail) enable urban growth by connecting suburbs to city centres, allowing workers to commute. 7. National integration: Roads, railways, and air links connect diverse regions and cultures, promoting unity and reducing regional disparities.
Government initiatives:
- Bharatmala Pariyojana — developing 83,000 km of highways.
- Dedicated Freight Corridors (Western and Eastern) to decongest rail routes and move freight faster.
- Sagarmala — port-led development along the coastline.
- UDAN — regional air connectivity to unserved airports.
- National Waterway development to shift freight to the cheapest mode.
Conclusion: Transport and economic development are inseparable. Investment in transport infrastructure directly boosts GDP growth, reduces poverty, and improves quality of life.
Common Mistakes to Avoid
1. Confusing population density with population distribution. Density is a numerical average (persons/sq km); distribution describes how people are spread across regions (pattern). 2. Saying India is the most populous country without context. The 2011 Census data still places India second. Acknowledge the textbook's position and mention recent UN estimates if needed. 3. Mixing up National Highways and State Highways. National Highways connect capitals and major cities (central government); State Highways connect district headquarters (state government). 4. Writing "waterways are fastest" or "airways are cheapest." It is the opposite — waterways are cheapest and slowest; airways are fastest and costliest. 5. Listing "railways carry the most passengers" without qualification. Roadways carry ~85% of passengers; railways dominate long-distance travel and bulk freight. 6. Confusing internal trade with international trade. Internal trade is within the country; international trade is between countries and involves foreign exchange, customs, and tariffs. 7. Forgetting to mention the Census year. Always write "as per the 2011 Census" when citing population data. Do not mix 2001 and 2011 figures. 8. Omitting the Golden Quadrilateral cities. It is Delhi–Mumbai–Chennai–Kolkata, not Delhi–Mumbai–Bengaluru–Kolkata. 9. Writing "India has a trade surplus." India consistently runs a trade deficit. Mention that invisible earnings (IT services, remittances) help narrow the current account deficit. 10. Confusing Doordarshan with a private channel. Doordarshan is under Prasar Bharati (public broadcaster), not a private entity.
Exam Checklist
- [ ] Can I define population density and state India's 2011 figure (382/sq km)?
- [ ] Can I name the most and least densely populated states (Bihar, Arunachal Pradesh)?
- [ ] Can I list at least 5 factors affecting population distribution?
- [ ] Can I name the four cities connected by the Golden Quadrilateral?
- [ ] Can I distinguish roadways, railways, waterways, and airways by speed, cost, and suitability?
- [ ] Can I state the first railway line (Mumbai–Thane, 1853)?
- [ ] Can I name at least 4 major ports (Mumbai, Chennai, Kolkata, Kochi)?
- [ ] Can I list 3 major exports and 3 major imports of India?
- [ ] Can I explain the balance of trade and state India's position (trade deficit)?
- [ ] Can I describe the role of communication (postal, telecom, internet, mass media) in development?
- [ ] Can I identify TRAI, Prasar Bharati, and NHAI with their roles?
- [ ] Can I draw/label an outline map showing the Golden Quadrilateral, major ports, and population density zones?
- [ ] Have I practised writing at least two detailed answers within the exam time limit?