Question : The rapidly growing mass of phytoplankton covering the surface water of a lake or pond is known as:
Option 1: eutrophication
Option 2: water bloom
Option 3: water pollution
Option 4: water hyacinth
Correct Answer: eutrophication
Solution : The correct answer is eutrophication.
When nutrient levels in any water body increase, especially that of phosphate and nitrate, which leads to increases in the biomass of the water body, this process is known as eutrophication. Its initial stage is characterised by the rapid growth of phytoplankton in the upper layer of the water body. It is caused because of agricultural runoff, and industrial waste, which increase nutrient levels. It is harmful and leads to the death of the aquatic ecosystem.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : In places, the groundwater is stored between layers of hard rock below the water table. This is known as a/an ______.
Option 1: pond
Option 2: lake
Option 3: well
Option 4: aquifer
Question : Which of the following is a major component of water pollution in the Bengal Basin?
Option 1: Chromium
Option 2: Arsenic
Option 3: Calcium
Option 4: Potassium
Question : ________ are not considered surface water.
Option 1: Oceans
Option 2: Lakes
Option 3: Rivers
Option 4: Aquifers
Question : In a mixture of 25 litres, the ratio of acid to water is 4 : 1. Another 3 litres of water is added. The ratio of acid to water in the new mixture is:
Option 1: 5 : 2
Option 2: 2 : 5
Option 3: 3 : 5
Option 4: 5 : 3
Question : Lake formed in a cut-off river, meander is called:
Option 1: Playa Lake
Option 2: Meteoric Lake
Option 3: Ox-Bow Lake
Option 4: Crater Lake
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile