Lakes

Correct answer: B. Siltation in the lake will increase

Soil from the catchment enters the lake and increases siltation. For exams connect catchment protection with lake conservation.

Correct answer: C. A curved river meander gets cut off

The direct answer is C: a curved river meander gets cut off. On a broad, fairly flat floodplain, a river develops a looping bend called a meander. Erosion attacks the outer banks and deposition builds the inner banks. The two ends of the bend may eventually join during a flood, cutting off the old loop. Water then follows the shorter main channel, while the abandoned loop becomes an oxbow lake. A is wrong because a straight mountain river normally does not create this cut-off loop. B is unrelated to lake formation. D describes underground flow, not a surface meander. Cue: cut-off meander = oxbow lake.

Correct answer: D. Both are coastal lagoon lakes

Chilika and Pulicat are examples of coastal lagoons. For exams connect them with sea influenced coastal lakes.

Correct answer: A. Unique wetland ecology

Phumdis are masses of floating vegetation that show Loktak Lake's special ecology. For exams connect Loktak with Manipur and phumdis.

Correct answer: B. Freshwater and Jammu Kashmir

Wular Lake is a famous freshwater lake of Jammu and Kashmir. For exams remember water type and location together.

Correct answer: C. It is a reservoir formed by Bhakra Nangal Dam

Gobind Sagar is a reservoir linked with a dam so it is considered artificial. For exams remember the relation between dam and reservoir.

Correct answer: D. Meteorite impact crater

Lonar Lake in Maharashtra is linked with a meteorite impact crater. For exams treat it as a lake of special origin.

Correct answer: A. Excessive algal growth and decline in water quality

Excess nutrients increase algal growth and reduce water quality. For exams connect eutrophication with lake pollution.

Correct answer: A. Because encroachment reduces the natural spread of the lake

When lake area reduces its ability to hold extra water falls. For exams link encroachment with reduced water storage.

Correct answer: B. Area between Krishna and Godavari deltas

Kolleru Lake lies in Andhra Pradesh between Krishna and Godavari delta regions. For exams connect it with the eastern coastal plain.

Correct answer: A. Backwater region of Kerala

Vembanad is a major backwater lake of Kerala. For exams connect it with South India's coastal water system.

Correct answer: B. Because they are affected by both seawater and land water

Lagoons are near the sea and can also be affected by river or rainwater. For exams remember Chilika as a mixed water lagoon.

Correct answer: C. Water level will fall and habitats will be affected

Excessive water withdrawal affects lake depth and habitats. For exams remember the balance between use and conservation.

Correct answer: D. Hill tourism lake of Uttarakhand

Nainital Lake is a famous hill lake of Uttarakhand. For exams remember the state and geographical setting together.

Correct answer: A. Water absorbs and releases heat slowly

Large water bodies help moderate nearby temperature. For exams remember the effect of lakes on local climate.

Correct answer: A. Increase in pollution and waste

Uncontrolled tourism can increase waste and pollution in a lake. For exams understand the balance between tourism and conservation.

Correct answer: A. Limited plants provide habitat but excessive growth can harm oxygen and water quality

Balanced vegetation supports ecology but excessive growth becomes a problem. For exams remember the idea of balance.

Correct answer: B. Because it reduces pollutants entering the lake

Treated water protects lake water quality. For exams treat pollution control as a main conservation measure.

Correct answer: B. Because they form from a cut off curved river bend

Cutting off a meander creates a horseshoe like water body. For exams identify oxbow lakes by shape.

Correct answer: B. Lonar meteorite crater

The direct answer is B: Lonar meteorite crater. Lonar Lake in Maharashtra occupies a depression formed when a meteorite struck basaltic rock, producing an impact crater. Therefore the lake–origin match in B is correct. A is wrong because Chilika is a coastal lagoon, not a meteorite crater. C is wrong because Sambhar is an inland saline lake, not a glacial lake. D is wrong because Gobind Sagar is a reservoir behind Bhakra Dam, not a meander cut-off lake. The key method is to match each lake with its formation process rather than only its location. Remember: Lonar is the famous impact-crater lake.

Correct answer: A. Fish habitat and health will be affected

Polluted water harms fish and their habitat. For exams connect economic use with water quality.

Correct answer: A. Many lakes are important wetlands and biodiversity centres

Ramsar importance is linked with wetland conservation and biodiversity. For exams connect lakes with conservation topics.

Correct answer: A. Vegetation binds soil and reduces erosion

The direct answer is A: vegetation binds soil and reduces erosion. Siltation means the settling and accumulation of soil particles, called silt, in a lake. When rain falls on bare lake banks, water can carry loose soil into the lake. Roots hold soil particles together, stems and leaves slow the movement of rainwater, and plant cover helps water enter the ground instead of rushing away. Therefore, less soil reaches the lake and siltation decreases. Option A is correct because it gives the real cause-and-effect chain: plants protect soil, reduced erosion means less silt enters the lake, and the lake remains healthier. Option B is wrong because plants do not stop the sea; the question concerns soil entering a lake. Option C is wrong because plantation does not immediately make freshwater saline; salinity depends on dissolved salts and water conditions. Option D is wrong because vegetation neither paves nor transforms a lake into a plain. Planting along shores is therefore a useful conservation measure. Memory cue: roots hold, leaves slow, and less soil settles.

Correct answer: A. Dal Lake tourism

Dal Lake is famous for tourism and houseboats in Srinagar. For exams remember tourism among economic uses of lakes.

Correct answer: A. When pollution encroachment and excessive withdrawal increase

Excessive human pressure can reduce lake quality and capacity. For exams study both resource and crisis aspects.