Search Previous Year Questions

The correct answer is Kosi.

Key Points

Kosi River:

• The Kosi river consists of seven streams namely Sut Kosi, Tamba Kosi, Talkha, Doodh Kosi, Botia Kosi, Arun, and Tamber.
• The river channel is braided and it shifts its course frequently.
• This has resulted in frequent devastating floods and has converted large tracts of cultivable land into wastelands in Bihar.
• Thus the river is often termed the ‘Sorrow of Bihar’.
• These streams flow through eastern Nepal which is known as the Sapt Kaushik region.
• The sources of seven streams of the Kosi have located in snow-covered areas which also receive heavy rainfall.
• Consequently, a huge volume of water flows with tremendous speed.
• Seven streams mingle with each other to form three streams named the Tumar, Arun, and Sun Kosi.
• They unite at Triveni north of the Mahabharata Range to form the Kosi.
• The river enters the Tarai of Nepal after cutting a narrow gorge in the Mahabharata Range.
• It joins the Ganga near Kursela in Katihar district of Bihar.
• Soon after debouching onto the plain, the river becomes sluggish.
• Large-scale deposition of eroded material takes place in the plain region.

The correct answer is Kaimur.

Key Points

• Telhar Kund is the name of a waterfall located on Bhabua - Audhora Road in the Kaimur district of Bihar.
• Telhar Waterfall is near the origin of Durgavati River it is located in Rohtas plateau.
• One can enjoy the curls and curves of the hilly road which passes through Kaimur hills.
• Karkat Waterfall and Kaimur Wildlife Sanctuary also lie in the Kaimur district.

The correct answer is Kanwar Lake.

Key Points

• Kanwar Lake located in the Begusarai district of Bihar is Asia's largest freshwater oxbow lake. Hence, option 3 is correct.
• Area: 2,620 hectares.
• It is the only Ramsar wetland site in Bihar. 
• Designation date: 21-07-2020.​
• The Ramsar site incorporates recorded 165 plant species and 394 animal species, including 221 bird species.
• It is an important stopover along the Central Asian Flyway, with 58 migratory waterbirds using it to rest and refuel.
• Five critically endangered species including three vultures:- the red-headed vulture, the white-rumped vulture and the Indian vulture, and two waterbirds i.e: the sociable lapwing and Baer’s pochard are found here.
• It is also known as Kanwar Lake Bird Sanctuary.

Additional Information 

• An oxbow is a crescent-shaped lake lying alongside a winding river.
• It is created over time as erosion and deposits of soil change the river's course.

The correct answer is Jamui.

Key Points

Gold reserve in Bihar

• Gold is a precious mineral used as an ornament and international currency. Also used in dentistry and carving.
• Gold deposits are in Gaya, Nalanda and Jamui districts.
• As per National Mineral Inventory, the total resources of primary gold ore in the country as of 1.4.2015 are estimated at 501.83 million tonnes with 654.74 tonnes of gold metal and out of this, Bihar is endowed with 222.885 million tonnes (44%) of ore containing 37.6 tonnes of metal.
• The Indian Geological Survey [GSI] confirmed gold deposits in the Kabutra and Nakia hill regions of Rajgir and Karmatia, Rani hill, Badmaria, Marhi hill in Sono block in Jamui district.
• As per the data of the National Mineral Inventory released by the Indian Bureau of Mines in August 2021, Gold reserves in India is estimated to be 501.83 MT.
• Geological Survey of India (GSI) carries out geological mapping and mineral exploration (survey) of various mineral commodities including gold to explore the mineral-rich zones.

Table of Gold Ore Reserve distribution in India:

The correct answer is Bhagalpur.

Key Points

Textile:

• The total number of weavers in Bihar is more than 90,000. Bhagalpur is known as a leading silk city.
• Gaya – another major weaving centre – around 8000.
• There are strong traditional handloom clusters in the districts of Bhagalpur, Gaya, Nalanda, Darbhanga, Madhubani, Siwan, Patna.
• Infrastructure Leasing and Financial Services is preparing Project Report for Textile Parks and also for Cluster Development Programmes. However, most of the textile centres in the state are on the decline, producing low-value goods.
• Now Gaya is developing very fast in the textile sector, approx 10000 looms are running and several new projects are coming soon.

The correct answer is 51.50%.

Key Points

• Female Literacy Rate in Bihar (Census 2011):
• According to the Census 2011 data, the female literacy rate in Bihar is 51.50%.
• This figure represents the percentage of females aged 7 and above who can read and write with understanding.
• The overall literacy rate in Bihar, including both males and females, is 61.80%, with male literacy at 71.20%.

Additional Information

• Census 2011 information:
• Census 2011 was the 15^th national census of India.
• In this, the total population of India was found to be 1.21 billion, which was 17.7% more than the 2001 census.
• The male literacy rate was 82.14% while the female literacy rate was 65.46%.
• According to Census 2011, the population of children aged 0-6 in India was 13.1 crore, which was 13.1% of the total population.
• This census was conducted digitally, using a number of new technologies and processes.

Source: http://dse.bihar.gov.in/Source/Provisional%20Population%20Totals%202011-Bihar.pdf

The correct answer is Sun

Key Points

• The Sun and the celestial bodies which revolve around it form the solar system, thus Sun is the heavenly body of Solar System.
• It consists of large number of bodies such as planets, comets, asteroids and meteors.
• The gravitational attraction between the Sun and these objects keeps them revolving around it.
• There are seven other planets that revolve around the Sun.
• Planets in their order of distance from the Sun are: **Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.**​

Additional InformationMercury (Budh):

• The planet mercury is nearest to the Sun.
• It is the smallest planet of our solar system.
• Because Mercury is very close to the Sun, it is very difficult to observe it, as most of the time it is hidden in the glare of the Sun.
• Mercury has no satellite of its own.

Venus (Shukra): 

• Venus is earth’s nearest planetary neighbour.
• It is the brightest planet in the night sky.
• It is often called a morning or an evening star, although it is not a star.
• Venus has no moon or satellite of its own.

**The Earth (Prithvi)**​

• The Earth is the only planet in the solar system on which life is known to exist.
• Some special environmental conditions are responsible for the existence and continuation of life on the Earth.

Mars: 

• The first outside the orbit of the Earth is Mars.
• It appears slightly reddish and, therefore, it is also called the red planet.
• Mars has two small natural satellites.

Jupiter (Brihaspati)

• Jupiter is the largest planet of the solar system.
• It is so large that about 1300 earths can be placed inside this giant.
• Jupiter has a large number of satellites.

Saturn (Shani)

• Beyond Jupiter is Saturn which appears yellowish in colour.

Neptune

• It was discovered on the basis of the law of gravitation.
• It is the farthest known planet from the Sun in the Solar System.
• Its revolution period is 164 years and the rotation period is 16 hours and 7 minutes.
• Neptune and Uranus are the only two planets discovered with help of a telescope.

The correct answer is Nickel and ferrum.

Key Points

• Core, mantle and crust are the three main concentric layers of the earth’s interior.
• The core is the innermost layer and has the highest density. It is made up mainly of nickel and iron.
• The core is the densest layer of the earth with its density ranging from 9.5 to 14.5 and sometimes even higher. It is composed mainly of iron and nickel thus commonly known as Nife (Nickel+Ferrum).
• The core consists of two sub-layers. The inner one is solid and the outer one is semi-liquid
• The mantle is the layer lying between the core and lithosphere and is about 2900 km thick. Its major constituents are silicon and magnesium. The density of this layer varies from 3.3 to 5.7.
• The mantle is surrounded by the outermost layer of the earth, known as the lithosphere and its density varies from 2.70 to 2.95.
• Major constituent elements of the lithosphere are silica (Si) and aluminium (Al), thus this layer is termed Sial (Silica+Aluminium).
• The outermost part of the lithosphere in known as the crust, normally about 8 to 40 km thick.

The correct answer is W. M. Davis

Key Points

• William Morris Davis, an American geomorphologist, was the first geomorphologist to present a general theory of landform development.
• Geomorphic cycle also called a geographic cycle, or cycle of erosion, theory of the evolution of landforms. American Geographer William Morris Davis (1850-1934) was the first geomorphologist who proposed the model of the cycle of erosion.
• Davis postulated his concept of the ‘geographical cycle’ popularly known as the ‘cycle of erosion’ in 1899 to present a genetic classification and systematic description of landforms.
• He developed a model showing sequential changes in landform through time. On the lines of Charles Darwin, Davis tried to study the evolution of the landforms as an organic form passing through the stages of Youth, Maturity, and Old.

The correct answer is Southern Hemisphere

Key Points Westerlies

• Westerlies in southern hemisphere at different lattitudes are known by the names of Roaring Forties, Furious Fifties, and Shrieking Sixties.
• The westerlies are the winds blowing from the subtropical high-pressure belts towards the sub-polar low-pressure belts.
• They blow from south­west to north-east in the northern hemisphere and north-west to south-east in the southern hemisphere.
• The westerlies of the southern hemisphere are stronger and persistent due to the vast expanse of water, while those of the northern hemisphere are irregular because of uneven relief of vast land masses.
• The westerlies are best developed between 40° and 65°S latitudes.
• These latitudes are often called Roaring Forties, Furious Fifties, and Shrieking Sixties – dreaded terms for sailors.