The Arunachal Himalayas extend from the east of the Bhutan Himalayas to ___ in the east.

Diphu pass

True or False: The general direction of the Arunachal Himalayas is from northeast to southwest.

False. The general direction is from southwest to northeast.

The Brahmaputra River flows through a deep gorge after crossing ___ peak.

Namcha Barwa

Fill in the blank: The rivers in Arunachal Pradesh are known for their high rate of fall and have significant ___ potential.

Hydro-electric power

List the names of any three prominent ethnic tribal communities found in Arunachal Pradesh.

Monpa, Dafla, Abor, Mishmi, Nishi, Nagas

True or False: Most ethnic communities in Arunachal Pradesh practice commercial agriculture.

False. Most practice Jhumming, which is shifting cultivation.

Fill in the blank: Due to rugged topography, inter-valley transportation linkages in Arunachal Pradesh are ___ .

Nominal

What is the significance of the duar region along the Arunachal-Assam border?

It serves as the main route for interactions due to limited inter-valley transportation.

The Eastern Hills and Mountains are known by different local names; in the south, they are called ___ hills.

Mizo or Lushai

True or False: The Barak river is an important river in both Manipur and Nagaland.

False. The Barak river is important in Manipur and Mizoram.

What unique geographical feature is located at the center of Manipur?

Loktak lake

Fill in the blank: Most of the hills in the Eastern Hills and Mountains are inhabited by numerous tribal groups practicing ___.

Jhum cultivation

Which river forms the tributary of the Brahmaputra in Nagaland?

Rivers in Nagaland

True or False: Mizoram is also referred to as the 'Molasse basin'.

True

The northern plains of India are primarily formed by ___ deposits brought by rivers such as the Indus, Ganga, and Brahmaputra.

Alluvial

True or False: The maximum depth of alluvium deposits in the northern plains ranges between 500-1000 meters.

False. The maximum depth of alluvium deposits varies between 1,000-2,000 meters.

The Bhabar zone is characterized by a narrow belt of land that ranges between ___ and ___ km in width.

8 and 10

What are the two sub-divisions of the alluvial plains in the northern plains?

Khadar and Bhangar

Fill in the blank: The Tarai region is known for its ___ growth of natural vegetation and varied wildlife.

Luxurious

True or False: The Brahmaputra river flows from southwest to northeast before entering Bangladesh.

False. The Brahmaputra river flows from northeast to southwest before it takes an almost 90º southward turn at Dhubri.

What is the general elevation range of the northern plains above mean sea level?

50-150 meters

Name the three broad groups into which the Peninsular Plateau can be divided.

The Deccan Plateau, the Central Highlands, and the Northeastern Plateau.