Question

Mountain ranges in the eastern part of India forming its boundary with Myanmar are collectively called

• A. Himachal
• B. Uttarakhand
• C. Purvachal
• D. None of the above

Answer 1

The correct option is C

Purvachal

Answer: The correct answer is option (C) – Purvachal.

• The Purvachal consist of Mizo hills, Manipur hills, and the Naga hills.
• The Eastern most boundary of the Himalayas is marked by the Brahmaputra river.
• The Himalayas start bending sharply towards the Southern direction, beyond the Dihang gorge. It runs all along the Eastern borders of India.
• They are known as the Eastern hills and mountains or Purvachal.
• They run as parallel valleys or ranges and are usually covered with very dense forests.
• Sedimentary rocks (strong sandstones) are found in these hills, which run through the North Eastern states of India.

Himalayan Mountain Ranges

• The Himalayas are spread over the northern borders of India. Himalayas are structurally folded mountains and geologically young mountains.
• It runs in the East to West direction from the Brahmaputra to the Indus.
• One of the most rugged mountain barriers in the world and the loftiest mountains in the world are the Himalayas.
• The width of the Himalayan mountain ranges 150 Km in Arunachal Pradesh and 400 Km in Kashmir and it covers a distance of 2400 Km while forming an arc.
• The variation in altitudes is lesser in the Eastern half of the Himalayas when compared to Western half of the Himalayas.
• Along the longitudinal extent of the Himalayas, there are three parallel ranges, and these ranges have many valleys in between them.
• Himadri or the Inner Himalayas or the Great Himalayas is the Northernmost range of the Himalayas.
• All the prominent Himalayan peaks can be found in the Himadri. With an average height of 6000 metres, Himadri has the loftiest mountain peaks and it is the most continuous mountain range.
• The Lesser Himalayas, also known as the Himachal, is the most rugged mountain system. This mountain range lies to the South of the Himadri.
• The width of this Himalayan mountain range is 50 Km and the altitude varies between 4500 Metres and 3700 Metres.
• Shiwaliks are the outermost ranges of the Himalayas. Their altitude varies from 1100 metres to 900 metres and their width ranges from 10 km to 50 km.