Transport and Communication Class 12 NCERT Solutions 2026-27

These five MCQs are pure name-to-place mapping. Build one-line mental map cards per landmark: Stuart = Australia north-south road; Big Trunk = North Atlantic ocean lane; Big Inch = Texas to East Coast, petroleum pipeline; Channel Tunnel = UK-France rail link. With the cards in place, each MCQ is a one-glance answer.

• (i) Stuart Highway, map card. Built during World War II to supply Darwin, the Stuart Highway now runs about 2,800 km from Darwin south through Alice Springs to Adelaide, with extensions into Victoria. Only option (a) names two Australian cities in a north-south corridor. Answer: (a).
• (ii) Railway density, map card. Density = km of track per 1,000 sq km of land area. The USA scores roughly 25 km per 1,000 sq km; Russia scores around 5-6 km per 1,000 sq km (huge area, similar track length). Canada and Brazil are lower still. Answer: (b).
• (iii) Big Trunk Route, map card. Trade between the EU and the USA crosses the North Atlantic. This corridor, called the Big Trunk Route, is the world’s busiest ocean corridor by container movement. The Mediterranean route is the Suez lane to Asia, a different route. Answer: (b).
• (iv) Big Inch, map card. Laid in 1942-44 to move Texas crude to East Coast refineries when German U-boats threatened coastal tankers, the Big Inch carries liquid petroleum. Answer: (d).
• (v) Channel Tunnel, map card. Opened in 1994, the 50-km undersea rail tunnel links Folkestone in the UK with Coquelles near Calais in France. The Eurostar carries passengers from London St Pancras to Paris Gare du Nord in about 2 hours 15 minutes. Answer: (b).

Build the same map-card discipline for other named transport lines: Trans-Siberian (St Petersburg to Vladivostok), Trans-Canadian (Halifax to Vancouver), Trans-Australian (Sydney to Perth) and the Suez and Panama canals. With the cards memorised, half of this chapter’s MCQs answer themselves.

(i) (a); (ii) (b); (iii) (b); (iv) (d); (v) (b).

30 words rewards short, structured answers. For (i), pair each terrain with its main physical problem. For (ii), give the chapter’s exact definition and one or two examples. For (iii), list three to four advantages in concrete terms.

• (i) Three terrains, three physical problems. Mountains: steep slopes demand tunnels and bridges, landslides disrupt services and snow blocks passes for months. Deserts: shifting sand dunes bury roads; the lack of nearby settlements means maintenance gangs cannot be permanently stationed. Flood-prone regions: every monsoon floods embankments and washes out bridges at the lowest points of the road, particularly river crossings. Together these three categories cover most of the world’s difficult-terrain road problems.
• (ii) Definition and canonical examples. A trans-continental railway is a railway that crosses an entire continent end to end, often linking one ocean coast to another. Major examples: Trans-Siberian (Moscow to Vladivostok, roughly 9,300 km, the longest in the world), Trans-Canadian (Halifax to Vancouver), and Australian Trans-Continental (Sydney to Perth). The Trans-African route from Algiers to Cape Town remains incomplete.
• (iii) Five advantages of water transport. It is the cheapest mode for bulk goods over long distances. No expensive track has to be built: nature provides the route. A Capesize bulk carrier can move 150,000 or more tonnes in a single voyage. It has the lowest fuel use per tonne-km of any long-haul mode. It causes minimal land disturbance compared to roads and railways.

Examiners reward students who pair each terrain with its physical-environment cause, name the canonical trans-continental examples, and give at least two distinct advantages of water transport beyond just “it is cheap”.

(i) Mountain: slopes and landslides; desert: sand cover and isolation; flood: bridge and embankment damage. (ii) Trans-continental railway crosses a whole continent (Trans-Siberian, Trans-Canadian). (iii) Water transport is cheap, high-capacity, energy-efficient and bulk-friendly.

Picture a container of garments leaving a Tirupur factory. It rides a truck to Chennai port, switches to a ship to Hamburg, switches to rail to a Bremen warehouse, then to a truck to a Berlin shop. Four modes, one container. That mental image is the answer to Q7.3 (i). For Q7.3 (ii), picture the four hub nodes on a world map. For Q7.3 (iii), picture an Indian developer writing code for a New York bank from home in Pune.

• (i) Why chaining beats any single mode. Ships dominate bulk and long distances but cannot reach inland factories. Rail dominates medium-distance, high-tonnage inland legs but is awkward for the last few kilometres. Road excels at last-mile delivery and door-to-door flexibility but is costly per tonne-km over long distances. Air is the only choice for high-value or perishable cargo over long distances. Pipelines crush all others on unit cost for liquids along fixed routes. Containerisation is the bridge that lets the same box move across all five without unloading. The result of chaining is lower cost, faster delivery and lower emissions per tonne.
• (ii) Four dense air-network regions, named and anchored. North America: Atlanta Hartsfield-Jackson and Chicago O’Hare are among the world’s busiest airports by passengers. Western Europe: London Heathrow, Paris CDG and Frankfurt anchor an integrated European network. East and South-East Asia: Tokyo, Beijing, Shanghai, Hong Kong, Seoul, Singapore are all global hubs. Middle East: Dubai is the long-haul transit capital of the world, mid-way between Europe, Asia and Africa. India and Brazil are fast-growing additions to this list. For Q7.3 (ii), name all four regions and at least one airport each to earn full marks.
• (iii) Four modes of cyberspace expansion. Economic: e-commerce, online banking, fintech and global outsourcing dissolve distance for buyers, sellers and workers. Educational: MOOCs, e-libraries and online certifications turn knowledge into a globally accessible good. Professional: remote work, telemedicine and digital collaboration let teams span continents. Social: social media, instant messaging, video calls and online communities keep relationships and cultures connected across borders. Cyberspace extends what humans can do, learn, earn and feel into a digital layer on top of the physical world. For Q7.3 (iii), cover at least three of the four expansion modes to earn full marks.

For Q7.3 (i), name the five modes and explain the chaining logic. For Q7.3 (ii), name all four regions and at least one airport each. For Q7.3 (iii), cover at least three of economic, educational, professional and social expansion.

Multimodal chains exploit each mode’s strength: ships for bulk, rail for inland tonnage, road for last mile, air for high value, pipeline for liquids. Air-dense regions: North America, Western Europe, East Asia, Middle East. Cyberspace expands economic, educational, professional and social space.