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Lifelines of National Economy – Class 10 Social Science notes, important questions and MCQs

NCERT Class 10 Social Science, chapter 12. Notes, key terms, important questions with answers and MCQs.

Chapter overview

Transport, communication and trade are the lifelines of a nation's economy. Roads, railways, pipelines, waterways and airways move people and goods, while communication networks carry information. Efficient transport links producers with markets and supports trade and tourism.

Roads and railways

The Golden Quadrilateral links Delhi, Kolkata, Chennai and Mumbai; the North–South corridor links Srinagar and Kanyakumari, and the East–West corridor links Silchar and Porbandar.
Roads are classified as Golden Quadrilateral super highways, national highways, state highways, district roads, other roads and border roads (built by the Border Roads Organisation, set up in 1960).
Railways are the principal mode of transport for freight and passengers; their density is low in hilly, desert and marshy areas.

Pipelines, waterways and ports

Pipelines carry crude oil, petroleum products and gas; they reduce transhipment losses and delays.
National Waterway 1 is on the Ganga (Haldia–Prayagraj), NW 2 on the Brahmaputra (Sadiya–Dhubri) and NW 3 is the West Coast Canal in Kerala.
Kandla (Deendayal Port) was the first port developed after Independence; Mumbai is the biggest port with a natural harbour.
Marmagao handles iron ore exports; Visakhapatnam is the deepest land-locked and well-protected port; Paradip in Odisha exports iron ore; Kolkata is an inland riverine port.

Airways, communication and trade

Air India provides domestic and international services; Pawan Hans helicopters serve hilly areas such as the north-east.
The Indian postal network is the largest in the world; first-class mail is airlifted.
Trade between two countries is international trade; if exports are more than imports, the balance of trade is favourable.
Tourism promotes national integration, international understanding and earns foreign exchange.

Key terms

Golden Quadrilateral: the super highway network linking Delhi, Kolkata, Chennai and Mumbai
Balance of trade: the difference between the value of a country's exports and imports
Border Roads Organisation: the body that builds and maintains roads in border areas, set up in 1960
Inland waterway: a navigable river or canal used for transport within a country

Important questions with answers

Why are transport and communication called the lifelines of a nation?2 marks

Transport and communication move goods, services and people and carry information between places. They link producers with consumers, support agriculture, industry, trade and tourism, and bring different parts of the country together, so the economy cannot function without them.

Explain three advantages of pipeline transport.3 marks

Pipelines carry crude oil, petroleum products and natural gas from oil fields and refineries to fertiliser plants, power stations and cities over long distances. They rule out transhipment losses and delays because goods move without being loaded and unloaded. Once laid, their running cost is low, though the initial cost of laying them is high.

Describe the major sea ports of India.5 marks

India has a long coastline with 12 major ports. On the west coast, Kandla (Deendayal Port) in the Gulf of Kachchh was the first port developed after Independence to ease the load on Mumbai. Mumbai is the biggest port with a spacious natural and well-sheltered harbour, and Jawaharlal Nehru Port was planned to decongest it. Marmagao in Goa is the premier iron ore exporting port, New Mangalore exports iron ore from Kudremukh, and Kochi is a natural harbour at the head of a lagoon. On the east coast, Tuticorin in Tamil Nadu has a natural harbour; Chennai is one of the oldest artificial ports; Visakhapatnam is the deepest land-locked and well-protected port; Paradip in Odisha specialises in iron ore export; and Kolkata is an inland riverine port, with Haldia developed as a subsidiary port to reduce its congestion.

Quick revision

GQ: Delhi–Kolkata–Chennai–Mumbai.
NW 1 Ganga, NW 2 Brahmaputra, NW 3 West Coast Canal.
Kandla first post-Independence port; Mumbai biggest natural harbour.
Favourable balance of trade = exports more than imports.

Exam tips

Practise marking major ports and airports on an outline map of India.
In 'importance of pipelines' answers, mention lower transport cost and fewer delays and losses.

Practice MCQs

The Golden Quadrilateral links
1. Silchar and Porbandar
2. Srinagar and Kanyakumari
3. Delhi, Kolkata, Chennai and Mumbai
4. Delhi and Agra
Show answer
Answer: (c) Delhi, Kolkata, Chennai and Mumbai. It is a 6-lane super highway network.
The first port developed after Independence was
1. Mumbai
2. Kolkata
3. Chennai
4. Kandla
Show answer
Answer: (d) Kandla. It was developed to reduce the load on Mumbai port after Karachi went to Pakistan.
National Waterway 1 is on the river
1. Brahmaputra
2. Mahanadi
3. Godavari
4. Ganga
Show answer
Answer: (d) Ganga. It runs between Haldia and Prayagraj.
The East–West corridor connects
1. Srinagar and Kanyakumari
2. Silchar and Porbandar
3. Delhi and Mumbai
4. Kolkata and Chennai
Show answer
Answer: (b) Silchar and Porbandar. It runs from Assam to Gujarat.
Which port is the deepest land-locked and well-protected port
1. Paradip
2. Haldia
3. Visakhapatnam
4. Tuticorin
Show answer
Answer: (c) Visakhapatnam. It is on the Andhra Pradesh coast.
Border roads are built and maintained by
1. Border Roads Organisation
2. NHAI
3. State PWD
4. Zila Parishad
Show answer
Answer: (a) Border Roads Organisation. The BRO was set up in 1960.
A country's balance of trade is favourable when
1. imports exceed exports
2. there is no trade
3. exports equal imports
4. exports exceed imports
Show answer
Answer: (d) exports exceed imports. More export value than import value gives a surplus.
Which port in Odisha specialises in the export of iron ore
1. Haldia
2. Marmagao
3. Paradip
4. Kandla
Show answer
Answer: (c) Paradip. Paradip is a major port on the Odisha coast.

All chapters of Class 10 Social Science

Written by Kundali IQ from standard, well-established facts to help with revision. This is not an official NCERT publication; always read your textbook too.