Which one of the following cities is NOT located on the Trans-Siberian rail route ?

The correct answer is C) Sochi. The Trans-Siberian route runs east from Moscow across Russia, with stops such as Yaroslavl, Kirov, Perm, Yekaterinburg, Tyumen, Omsk, Novosibirsk, Krasnoyarsk, Irkutsk, Ulan-Ude, Chita, Khabarovsk and finally Vladivostok on the Pacific coast.

• Kazan (A): Kazan is on the Trans-Siberian network through the Moscow-Kazan-Yekaterinburg line, which many services use, so it is not the answer.
• Omsk (B): Omsk is a major city on the main line in western Siberia, on the Irtysh river.
• Chita (D): Chita lies on the eastern stretch between Lake Baikal and the Far East, near the Chinese border.
• Sochi (C): Sochi is a Black Sea resort in southern Russia, near the Caucasus. It lies far from the Siberian corridor, so it is the city not on the route.

The core concept is the geography of Russian rail corridors. Students should link this to Russia's Eurasian connectivity and the role of the Trans-Siberian in resource movement, which is useful for Mains answers on Central Asia and Russia's Far East.

Trap: Aspirants often pick Kazan because it is a large city on the Volga and is served by long-distance trains. Check whether the city lies on the main Siberian axis, not just whether it has a rail station.