All Free General Knowledge MCQs with Answers

• A. Brazil and Paraguay
• B. Bolivia and Brazil
• C. Argentina and Brazil
• D. Argentina and Uruguay

Explanation: The Iguazu Falls are shared by Argentina and Brazil.

• A. Guyana; the Potaro River
• B. Suriname; the Coppename River
• C. Venezuela; the Caroní River
• D. Brazil; the Trombetas River

Explanation: Kaieteur Falls drops from the Potaro River in Guyana's rainforest.

• A. Eswatini
• B. South Africa
• C. Zimbabwe
• D. Lesotho

Explanation: Tugela Falls in South Africa's Drakensberg is often listed as the world's second-tallest.

• A. Colorado
• B. Washington
• C. California
• D. Oregon

Explanation: Yosemite Falls is in California's Yosemite National Park.

• A. The Krishna River
• B. The Kaveri River
• C. The Tungabhadra River
• D. The Sharavathi River

Explanation: Karnataka's Jog Falls plunge over the Sharavathi River.

• A. The Mandovi River
• B. The Netravati River
• C. The Kali River
• D. The Zuari River

Explanation: Dudhsagar Falls on the Goa–Karnataka border drops from the Mandovi River.

• A. The Pamba River
• B. The Chalakudy River
• C. The Periyar River
• D. The Bharathappuzha River

Explanation: Kerala's Athirappilly Falls are on the Chalakudy River.

• A. The Vaigai River
• B. The Thamirabarani River
• C. The Kaveri (Cauvery) River
• D. The Palar River

Explanation: Tamil Nadu's Hogenakkal Falls are on the Kaveri River.

• A. Chitrakote Falls
• B. Jog Falls
• C. Nohkalikai Falls
• D. Dudhsagar Falls

Explanation: Chitrakote Falls on the Indravati is India's widest waterfall, nicknamed the Niagara of India.

• A. Nagaland
• B. Meghalaya
• C. Assam
• D. Arunachal Pradesh

Explanation: Nohkalikai Falls near Cherrapunji in Meghalaya is among India's tallest waterfalls.

• A. Dettifoss
• B. Seljalandsfoss
• C. Gullfoss
• D. Skógafoss

Explanation: Gullfoss ("Golden Falls") thunders over the Hvitá River in south-west Iceland.

• A. Goðafoss
• B. Svartifoss
• C. Dettifoss
• D. Gullfoss

Explanation: Dettifoss in north-east Iceland is considered Europe's most powerful waterfall by volume.

• A. Austria
• B. France
• C. Germany
• D. Switzerland

Explanation: The Rhine Falls near Schaffhausen in Switzerland are Europe's largest plain waterfalls.

• A. The Mekong River (in Laos)
• B. The Irrawaddy River
• C. The Salween River
• D. The Chao Phraya River

Explanation: The Khone Falls on the Mekong in southern Laos are among the world's widest waterfalls.

• A. The Kasai River
• B. The Congo River (upper course) in DR Congo
• C. The Lualaba River
• D. The Ubangi River

Explanation: The Boyoma Falls (ex-Stanley Falls) are rapids on the upper Congo in DR Congo.

• A. Rwanda
• B. Kenya
• C. Uganda
• D. Tanzania

Explanation: Murchison Falls, where the Victoria Nile squeezes through a gorge, is in Uganda.

• A. Ethiopia
• B. Sudan
• C. Egypt
• D. South Sudan

Explanation: The Blue Nile Falls (Tis Issat) are in north-west Ethiopia.

• A. By glaciers melting suddenly
• B. By running water eroding soft rock beneath a layer of resistant hard rock, creating a vertical drop
• C. By volcanic eruptions damming rivers
• D. By earthquakes cracking riverbeds

Explanation: Waterfalls typically form where a river erodes soft rock under a hard caprock, undercutting it into a drop.

• A. An iceberg floating at sea
• B. A frozen lake
• C. A large, slowly moving mass of ice formed from compacted snow
• D. A snowstorm in the mountains

Explanation: Glaciers are slow rivers of ice built up from snow compacted over many years.

• A. Wind pushing the ice
• B. Ocean currents
• C. Earth's rotation
• D. Gravity acting on the ice's own weight

Explanation: Glaciers flow downhill under gravity, deforming under their own immense weight.