GeographyCBSE Class 12 · Transport and Communication in India

Air Transport and Oil and Gas Pipelines in India (Class 12 Geography, India: People and Economy, Chapter 7)

Updated 17 October 2026 · Fact-checked

Air transport is the fastest means of movement and suits India's large distances and diverse terrain. Its start was the 1911 airmail between Prayagraj and Naini. Pipelines carry liquids, gases and slurried solids over long distances: OIL's Naharkatiya-Barauni line (1,157 km) was Asia's first cross-country pipeline and GAIL's HVJ line is 1,700 km.

Understand Air Transport and Oil and Gas Pipelines in India

Why this topic matters. After roads, rail and water transport, NCERT closes land and air transport with air services and pipelines. Questions are on the beginning of air services, UDAN, Pawan Hans, the first pipeline and the gas grid.

1. Air transport.

It is the fastest means of movement and reduces distances by minimising travel time.
It is essential for a vast country like India, where distances are large and terrain and climate are diverse.
Beginning: 1911, when airmail operation began over a short distance of 10 km between Prayagraj and Naini. Real development came in the post-Independence period.
The Airport Authority of India is responsible for safe, efficient air traffic and aeronautical communication services in Indian air space.
UDAN (Ude Desh ka Aam Nagrik): the Regional Connectivity Scheme conceived by the Ministry of Civil Aviation to make flying affordable for the common citizen. The central idea is to encourage airlines to operate on regional and remote routes through enabling policies and incentives; NCERT calls it a first-of-its-kind scheme globally to jump-start the regional aviation market.
Pawan Hans is the helicopter service operating in hilly areas, widely used by tourists in the north-eastern sector; Pawan Hans Limited also serves the petroleum sector and tourism.

2. Why pipelines.

Pipelines are the most convenient and efficient mode of transporting liquids and gases over long distances.
Solids can also be moved by pipeline after being converted into slurry.

3. Oil pipelines: Oil India Limited (OIL).

OIL works under the Ministry of Petroleum and Natural Gas, and is engaged in exploration, production and transport of crude oil and natural gas; it was incorporated in 1959.
It built Asia's first cross-country pipeline, 1,157 km, from the Naharkatiya oilfield in Assam to the Barauni refinery in Bihar. It was extended to Kanpur in 1966.

4. Gas pipelines: GAIL (India) Ltd.

GAIL was set up in 1984 as a public sector undertaking to transport, process and market natural gas.
The first 1,700 km cross-country Hazira-Vijaipur-Jagdishpur (HVJ) gas pipeline linked the Mumbai High and Bassein gas fields with fertiliser, power and industrial complexes in western and northern India, giving an impetus to the Indian gas market.
India's gas infrastructure has expanded more than ten times, from 1,700 km to 18,500 km of cross-country pipelines, and is expected to reach over 34,000 km as a Gas Grid linking all gas sources and consuming markets, including the North-Eastern states.

5. Comparing modes. Air is fast but suits passengers and special goods; pipelines are cheap and continuous for fluids; roads and railways carry general goods. (Comparison made by us for revision; NCERT lists the facts above.)

Graph checklist. Draw a map outline marking Naharkatiya, Barauni and Kanpur for the OIL line, and Hazira, Vijaipur and Jagdishpur for the HVJ line.

Key quotations

Short lines worth knowing by heart: who says them, when, and why they matter.

Pipelines are the most convenient and efficient mode of transporting liquids and gases over long distances.
NCERT, India: People and Economy, Chapter 7: Opening line of the section on oil and gas pipelines.
The justification to quote in any pipeline answer.

Air Transport and Oil and Gas Pipelines in India: key facts

Air transport facts: 1911 airmail
Prayagraj to Naini
10 km
Airport Authority of India
UDAN by Ministry of Civil Aviation; Pawan Hans runs helicopter services in hilly areas.
OIL pipeline: OIL incorporated 1959
Naharkatiya (Assam) to Barauni (Bihar)
1,157 km
Extended to Kanpur in 1966; Asia's first cross-country pipeline.
GAIL pipeline: GAIL set up 1984
HVJ pipeline 1,700 km
Mumbai High and Bassein gas fields; Links fertiliser, power and industrial complexes.
Gas grid: 1,700 km to 18,500 km
Expected over 34,000 km
Includes North-Eastern states; More than ten-fold expansion.

How to answer Air Transport and Oil and Gas Pipelines in India questions

Keep air and pipelines in separate paragraphs. Give year, agency and number for every pipeline fact.

1Begin with why air transport matters for India's size and terrain.
2Give the 1911 beginning, AAI and the aim of UDAN.
3State what Pawan Hans does and where.
4For pipelines, name the agency, the route and the length.
5Close with the gas grid expansion from 1,700 km to 18,500 km and beyond.

Air Transport and Oil and Gas Pipelines in India in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Affordable regional flights

Suppose a small town without scheduled flights gets a service after an airline is offered incentives to fly to regional and remote routes at fares the common citizen can pay.

Which NCERT scheme is the scenario modelled on, and what is its central idea?

Try it first, then show the solutionSolution

UDAN, the Regional Connectivity Scheme of the Ministry of Civil Aviation, aims to make flying affordable.
It encourages airlines to operate on regional and remote routes through policies and incentives.

Answer: It resembles UDAN, whose central idea is to encourage airlines to fly regional and remote routes by incentives.

Memory hook: Incentive up, fare down.

Gas to fertiliser plant

Suppose a fertiliser plant 1,500 km from a gas field gets continuous supply through a buried line instead of tankers, with no road traffic.

Which NCERT point on pipelines does this illustrate?

Try it first, then show the solutionSolution

Pipelines are the most convenient and efficient way to move liquids and gases over long distances.
The HVJ line similarly linked gas fields with fertiliser, power and industrial complexes.

Answer: It shows pipelines as an efficient, convenient mode for long-distance gas supply, like the HVJ pipeline.

Memory hook: Underground, uninterrupted.

Tricks to remember Air Transport and Oil and Gas Pipelines in India

Short memory aids. Say each one aloud once, then use it on a question the same day.

1911, 10 km
First airmail ran 10 km, Prayagraj to Naini, in 1911.
Use it when: Beginning of air transport.
N to B to K
Naharkatiya, Barauni, Kanpur in order of the OIL line.
Use it when: Route of Asia's first pipeline.
59, 84
OIL in 1959, GAIL in 1984.
Use it when: Years of formation.
17 to 185 to 340
Hundreds of km: 1,700, 18,500, 34,000 gas pipeline growth.
Use it when: Gas grid expansion.

Air Transport and Oil and Gas Pipelines in India: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: First airmail · 1 mark · MCQBoard level

Air transport in India began in 1911 with airmail operations between:
(A) Delhi and Agra
(B) Prayagraj and Naini
(C) Mumbai and Pune
(D) Kolkata and Dhaka

Try it first, then show the solutionSolution

NCERT: airmail over a distance of 10 km between Prayagraj and Naini began in 1911 (1 mark).

Answer: (B) Prayagraj and Naini

Example 2: Statements on pipelines · 1 mark · MCQHarder board level

Consider the statements:
I. Asia's first cross-country pipeline was built by OIL from Naharkatiya to Barauni.
II. It was extended up to Kanpur in 1966.
III. GAIL was set up in 1959.
Which are correct?
(A) I and II only
(B) II and III only
(C) I and III only
(D) I, II and III

Try it first, then show the solutionSolution

I and II are NCERT facts.
III is wrong: OIL was incorporated in 1959; GAIL was set up in 1984 (1 mark).

Answer: (A) I and II only

Example 3: Assertion and reason on solids in pipelines · 1 mark · Assertion-reasonHarder board level

Assertion (A): Even some solids can be transported through pipelines.
Reason (R): Solids can be converted into slurry before being sent through the pipe.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.

Try it first, then show the solutionSolution

NCERT says solids can also be transported by pipelines after converting them into slurry.
R gives the condition that makes A possible (1 mark).

Answer: (A) Both (A) and (R) are true and (R) is the correct explanation of (A).

Example 4: Source-based: the HVJ pipeline · 3 marks · Source-basedHarder board level

Read the passage: "GAIL (India) Ltd. was set up in 1984 as a public sector undertaking to transport, process and market natural gas for its economic use. The first 1,700 km long Hazira-Vijaipur-Jagdishpur cross-country gas pipeline linked Mumbai High and Bassein gas fields with various fertiliser, power and industrial complexes in western and northern India. Overall, India's gas infrastructure has expanded over ten times from 1,700 km to 18,500 km of cross-country pipelines."
(i) In which year was GAIL set up? (1)
(A) 1959 (B) 1966 (C) 1984 (D) 1995
(ii) What was the length of the first HVJ pipeline? (1)
(A) 1,157 km (B) 1,700 km (C) 18,500 km (D) 34,000 km
(iii) Which gas fields did the HVJ pipeline link with the user complexes? (1)
(A) Krishna-Godavari (B) Mumbai High and Bassein (C) Naharkatiya (D) Digboi

Try it first, then show the solutionSolution

(i) 1984, so (C) (1 mark).
(ii) 1,700 km, so (B) (1 mark).
(iii) Mumbai High and Bassein, so (B) (1 mark).

Answer: (i) C; (ii) B; (iii) B

Example 5: Pawan Hans and air service · 3 marks · Short answerBoard level

Describe the role of the Airport Authority of India and of Pawan Hans in India's air transport. (3 marks)

Try it first, then show the solutionSolution

The Airport Authority of India is responsible for safe, efficient air traffic and aeronautical communication services in Indian air space (1 mark).
Pawan Hans is the helicopter service operating in hilly areas (1 mark).
It is widely used by tourists in the north-eastern sector and serves the petroleum sector (1 mark).

Answer: The Airport Authority of India provides safe and efficient air traffic and aeronautical communication services in Indian air space. Pawan Hans is a helicopter service operating in hilly areas. It is widely used by tourists in the north-eastern sector, and Pawan Hans Limited also provides helicopter services to the petroleum sector.

Example 6: HOTS: why pipelines suit India · 5 marks · Long answerHOTS / competency

Using the OIL and GAIL examples, explain why pipelines are described as the most convenient and efficient mode for long-distance transport of liquids and gases, and what the Gas Grid aims to do. (5 marks)

Try it first, then show the solutionSolution

Pipelines move liquids and gases over long distances; solids too after being turned into slurry (1 mark).
OIL's 1,157 km Naharkatiya-Barauni line, extended to Kanpur in 1966, took Assam's crude to refineries (1 mark).
GAIL's 1,700 km HVJ line linked Mumbai High and Bassein gas to fertiliser, power and industrial complexes (1 mark).
Expansion from 1,700 km to 18,500 km shows rising demand (1 mark).
The Gas Grid, over 34,000 km, aims to link all gas sources and consuming markets, including the North-East (1 mark).

Answer: Pipelines are the most convenient and efficient mode for moving liquids and gases over long distances, and even solids can be moved after conversion into slurry. OIL built Asia's first cross-country pipeline, 1,157 km from the Naharkatiya oilfield in Assam to the Barauni refinery in Bihar, extended to Kanpur in 1966. GAIL's first 1,700 km HVJ gas pipeline linked the Mumbai High and Bassein gas fields with fertiliser, power and industrial complexes in western and northern India, giving an impetus to the gas market.

India's gas infrastructure has expanded more than ten times, from 1,700 km to 18,500 km. It is expected to exceed 34,000 km as a Gas Grid linking all the gas sources and consuming markets, including the North-Eastern states, so supply reaches distant users without other transport.

Where students lose marks in Air Transport and Oil and Gas Pipelines in India

The slips examiners see most often, and what to write instead.

Mistake: Interchanging OIL and GAIL
Both are petroleum bodies.
Wrong working
GAIL built the Naharkatiya-Barauni oil pipeline.
Right working
OIL built the oil pipeline; GAIL transports gas (HVJ).
Do this: O for oil, G for gas.
Usually costs: 1 mark.
Mistake: Wrong first airmail route
Students pick major cities.
Wrong working
First airmail ran between Mumbai and Karachi.
Right working
1911, Prayagraj to Naini, 10 km.
Do this: Remember the 10 km short hop.
Usually costs: 1 mark.
Mistake: Omitting slurry
Pipelines are linked only to oil and gas.
Wrong working
Pipelines carry only liquids and gases.
Right working
Solids can also be moved after conversion into slurry.
Do this: Add the slurry line to the answer.
Usually costs: 1 mark.

Exam tips

Write the agency, route, length and year in one line for each pipeline; that is how marking schemes award marks.
Do not confuse UDAN (a flying scheme) with transport corridors; write 'Regional Connectivity Scheme'.
Link Pawan Hans with hilly areas and the north-east in every answer.

Practice questions on Air Transport and Oil and Gas Pipelines in India

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
The helicopter service Pawan Hans is widely used by tourists in:
(A) the Thar desert
(B) the north-eastern sector
(C) the Deccan plateau
(D) the Western Ghats coast
Hint
Hilly areas.
Answer
(B) the north-eastern sector.
Q2 · 2 marks · Very short answerHarder board level
Match: (a) OIL, (b) GAIL, (c) Pawan Hans, (d) UDAN with (i) helicopter service, (ii) regional connectivity scheme, (iii) natural gas transport and marketing, (iv) crude oil exploration and transport. (2 marks)
Hint
Match each body with its function.
Answer
(a)-(iv) crude oil exploration and transport; (b)-(iii) natural gas transport and marketing; (c)-(i) helicopter service; (d)-(ii) regional connectivity scheme.
Q3 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Air transport is essential for a vast country like India.
Reason (R): Distances are large and the terrain and climatic conditions are diverse.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.
Hint
Why is speed needed?
Answer
(A) Both are true and R explains A.
Q4 · 3 marks · Short answerHarder board level
India's cross-country gas pipelines expanded from 1,700 km to 18,500 km and are expected to exceed 34,000 km. Calculate the expansion factor so far (to one decimal) and the further length to be added to reach 34,000 km. (3 marks)
Hint
Divide, then subtract.
Answer
Factor = 18,500 / 1,700 = 10.9, consistent with NCERT's 'over ten times'. Further length = 34,000 - 18,500 = 15,500 km (both derived by us from NCERT's figures; NCERT gives 34,000 as an expectation, 'over 34,000').
Q5 · 3 marks · Short answerBoard level
Why are pipelines considered convenient and efficient for transporting oil and natural gas? Write three points. (3 marks)
Hint
Long distances, liquids and gases, slurry.
Answer
Pipelines move liquids and gases over long distances without needing other vehicles. They link producing fields directly to refineries and consuming centres, as the OIL line from Naharkatiya to Barauni and the HVJ line from Mumbai High and Bassein to industrial complexes do. Even solids can be transported after converting them into slurry.
Q6 · 3 marks · Short answerHOTS / competency
The Gas Grid is expected to include the North-Eastern states. Suggest, with reasons from NCERT, why helicopter services and pipelines both matter for the region. (3 marks)
Hint
Pawan Hans, Gas Grid, OIL's Assam start.
Answer
Pawan Hans helicopter services operate in hilly areas and are widely used by tourists in the north-eastern sector, helping access where terrain is difficult. The first cross-country pipeline started from Assam's Naharkatiya oilfield, and the Gas Grid is planned to link all gas sources and markets, including the North-Eastern states. Together they link the region with the rest of the country through air and pipeline modes.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Which body is responsible for air traffic services in Indian air space?Show answer
The Airport Authority of India.
2.Expand UDAN.Show answer
Ude Desh ka Aam Nagrik.
3.In which year was the OIL pipeline extended to Kanpur?Show answer
1966.
4.Which ministry administers Oil India Limited?Show answer
The Ministry of Petroleum and Natural Gas.
5.What does the Gas Grid aim to link?Show answer
All the gas sources and consuming markets across the country, including the North-Eastern states.

Air Transport and Oil and Gas Pipelines in India: frequently asked questions

Why is air transport important for India?

It is the fastest means of movement and the country has large distances and diverse terrain and climate.

What did the 1911 airmail cover?

A distance of 10 km between Prayagraj and Naini.

Can solids move through pipelines?

Yes, after converting them into slurry.

What does GAIL do?

It transports, processes and markets natural gas for economic use.