Q1. How many physiographic divisions is Assam divided into?
A) 2
B) 3
C) 4
D) 5
Answer: B) 3

Detailed Explanation: Assam has 3 physiographic divisions: 1. Brahmaputra Valley (72% area), 2. Barak Valley (9% area), 3. Karbi-Anglong & North Cachar Hills (19% area). This was asked in ADRE Grade 4 2024 and Assam Police 2022.

Assamese: অসমক ৩ টা ভূ-আকৃতি ভাগত ভাগ কৰা হৈছে - ব্ৰহ্মপুত্ৰ উপত্যকা, বৰাক উপত্যকা আৰু পাহাৰীয়া অঞ্চল।

Q2. Karbi Plateau is an extension of which plateau?
A) Chota Nagpur
B) Meghalaya Plateau
C) Deccan
D) Tibetan
Answer: B) Meghalaya Plateau

Explanation: Karbi Plateau is extension of Meghalaya Plateau (part of Deccan Plateau). It is oldest landmass in Assam, made of Archean rocks. Forms water divide between Brahmaputra & Barak.

Q3. Barak River originates from which state?
A) Mizoram
B) Manipur
C) Nagaland
D) Meghalaya
Answer: B) Manipur (Mukru Hills, Senapati district)

Explanation: Barak originates from Manipur hills, length 900 km (532 km in India), flows through Cachar Valley (now 3 districts - Cachar, Sribhumi, Hailakandi) and enters Bangladesh as Surma & Kushiyara. Very important for Barak Valley GK.

Assamese: বৰাক নদী মণিপুৰ পাহাৰৰ পৰা উৎপত্তি হৈছে।

Q4. Which is largest tributary of Brahmaputra (North Bank)?
A) Manas
B) Subansiri
C) Dhansiri
D) Kopili
Answer: B) Subansiri (518 km)

Explanation: Subansiri 518 km, largest tributary of Brahmaputra contributing 7.92% of total flow. Originates in Tibet (China) called Loro Chu, enters India in Arunachal. ADRE asked north bank tributary in 2024.

Trick: North Bank - SJM - Subansiri, Jia Bharali, Manas

Q5. Which is largest south bank tributary of Brahmaputra?
A) Burhi Dihing
B) Manas
C) Kopili (Kapili)
D) Subansiri
Answer: C) Kopili (Kapili) - 290 km

Explanation: Kopili is largest south bank tributary, originates in Meghalaya plateau. Second largest south bank is Dhansiri. As per Assam Govt textbook SCERT Class 9.

Trick: South Bank - KDB - Kopili, Dhansiri, Burhi Dihing

Q6. What is highest peak of Assam?
A) Laike Peak
B) Tumjang Peak
C) Daphabum
D) Saramati
Answer: B) Tumjang Peak (1860m) in Borail Range, Dima Hasao

Explanation: Tumjang 1860m is highest in Assam, in Dima Hasao. Second highest Laike Peak 1496m also in Dima Hasao. Borail Range is highest hill range in Assam.

Q7. What type of climate does Assam have?
A) Tropical Monsoon
B) Desert
C) Alpine
D) Mediterranean
Answer: A) Tropical Monsoon / Humid Subtropical

Explanation: Average rainfall 2300 mm, temperature 25-32°C summer, 8-20°C winter. Monsoon June-September contributes 70% rain.

Q8. Which district in Assam receives highest rainfall inside Assam?
A) Cherrapunji
B) Mawsynram
C) Lakhimpur
D) Barak Valley
Answer: C) Lakhimpur & Dhemaji receive highest rainfall inside Assam

Explanation: Students confuse Cherrapunji/Mawsynram but they are in Meghalaya, not Assam. Inside Assam, Lakhimpur, Dhemaji, Tinsukia get highest rainfall (3000+ mm). Lowest rainfall - Nagaon, Morigaon.

Q9. Deepor Beel, only Ramsar Site of Assam is in which district?
A) Kamrup Metro
B) Nagaon
C) Cachar
D) Dibrugarh
Answer: A) Kamrup Metro (Near Guwahati)

Explanation: Only Ramsar Site of Assam declared in 2002, area 40 sq km, near Guwahati. Famous for migratory birds. ADRE asked this in 2024 Shift 1.

Q10. Son Beel, largest wetland of Assam is located in?
A) Barpeta
B) Sribhumi (Old Karimganj)
C) Dhubri
D) Morigaon
Answer: B) Sribhumi District (Earlier Karimganj) - Renamed Nov 2024

Explanation: Son Beel is largest beel/wetland in Assam (3448 ha) and second largest wetland in Asia after Loktak Lake Manipur. Located in Sribhumi district (earlier Karimganj). In exam if option shows Karimganj, tick that, but new books write Sribhumi.

Assamese: শোণ বিল অসমৰ আটাইতকৈ ডাঙৰ বিল, শ্ৰীভূমি জিলাত অৱস্থিত।

Q11. Total length of Brahmaputra in Assam?
A) 450 km
B) 650 km
C) 900 km
D) 2900 km
Answer: B) 650 km inside Assam, total 2900 km (China-Tibet Yarlung Tsangpo 1700 km, India 920 km, Bangladesh 240 km)

Q12. How many districts are there in Barak Valley as per 2026?
A) 2
B) 3
C) 4
D) 5
Answer: B) 3 - Cachar, Sribhumi (old Karimganj), Hailakandi

Explanation: Barak Valley 3 districts. HQ - Silchar is HQ of Cachar. All 3 share border with Bangladesh.

Q13. Which soil is found in Karbi Anglong & Dima Hasao?
A) Alluvial
B) Laterite & Red Soil
C) Black
D) Peaty
Answer: B) Laterite & Red Soil in hill areas

Explanation: Hills - Laterite & Red soil (less fertile). Plains (Brahmaputra & Barak) - Alluvial soil (highly fertile, good for paddy).

Q14. Assam shares border with how many Indian states?
A) 5
B) 6
C) 7
D) 8
Answer: C) 7 states

Explanation: 7 states - Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, West Bengal (only 2 km border with WB at Dhubri). Plus 2 countries - Bhutan & Bangladesh.

Q15. Dibru-Saikhowa National Park is located in?
A) Tinsukia & Dibrugarh
B) Jorhat & Sivasagar
C) Sonitpur
D) Cachar
Answer: A) Tinsukia & Dibrugarh - Famous for Feral Horses & Biosphere Reserve (1997)

Q16. Which type of forest is mostly found in Assam?
A) Tropical Evergreen
B) Tropical Semi-evergreen & Moist Deciduous
C) Alpine
D) Thorn
Answer: B) Tropical Semi-evergreen is main type in Assam (50%+)

Q17. Majuli island is formed by which rivers?
A) Brahmaputra & Subansiri
B) Brahmaputra & Kherkutia Suti
C) Brahmaputra & Lohit
D) Brahmaputra & Dhansiri
Answer: B) Brahmaputra & Kherkutia Suti (anabranch of Brahmaputra) + Subansiri in north

Q18. Which river is called Kameng in Arunachal Pradesh?
A) Manas
B) Jia Bhoroli (Jia Bharali)
C) Subansiri
D) Dhansiri
Answer: B) Jia Bhoroli is called Kameng in Arunachal, flows through Sonitpur & Darrang

Q19. How many international countries share border with Assam?
A) 1
B) 2
C) 3
D) 4
Answer: B) 2 - Bhutan (North - 267 km) and Bangladesh (South - 143 km)

Q20. Oldest oil refinery in India located in Assam?
A) Guwahati
B) Bongaigaon
C) Digboi
D) Numaligarh
Answer: C) Digboi Refinery - Established 1901, Asia's first refinery, called Oil City of Assam

Explanation: Guwahati Refinery 1962, Bongaigaon 1974, Numaligarh 1999.

Q21. What is total geographical area of Assam?
A) 65,000 sq km
B) 78,438 sq km
C) 85,000 sq km
D) 72,000 sq km
Answer: B) 78,438 sq km (2.39% of India)

Q22. Which is second largest river of Assam after Brahmaputra?
A) Manas
B) Barak
C) Subansiri
D) Kopili
Answer: B) Barak (532 km in India)

Q23. Which district of Assam has highest forest cover?
A) Dibrugarh
B) Karbi Anglong
C) Jorhat
D) Cachar
Answer: B) Karbi Anglong - Largest district + Highest forest cover (60%+)

Q24. What is latitudinal extent of Assam?
A) 24°08'N to 28°02'N
B) 22°N to 26°N
C) 24°N to 29°N
D) 25°N to 27°N
Answer: A) 24°08'N to 28°02'N & Longitude 89°42'E to 96°02'E

Q25. Which river is called 'Sorrow of Assam' due to floods?
A) Barak
B) Kopili
C) Brahmaputra
D) Dhansiri
Answer: C) Brahmaputra - Causes devastating floods every year due to heavy siltation & 39 tributaries