Environmental Studies Quiz

What percentage of Earth's water is freshwater?

• 50%

• 30%

• 2.5%

• 10%

Which river is not part of the Indian river system?

• Ganga

• Nile

• Krishna

• Godavari

The ideal pH of drinking water should be:

• 5.5

• 6.5-8.5

• 9.0

• 10.5

Which parameter indicates the presence of organic pollutants in water?

• DO

• BOD

• COD

• TDS

Which technique helps conserve groundwater by collecting rooftop water?

• Desalination

• Distillation

• Rainwater Harvesting

• Filtration

Eutrophication is mainly caused by:

• Excess salt

• Organic matter

• Nutrient runoff

• Industrial efluents

Which organization is responsible for water pollution control in India?

• NDMA

• CPCB

• ISRO

• FCI

The permissible TDS in drinking water is:

• 1000 mg/L

• 2000 mg/L

• 500 mg/L

• 50 mg/L

Thermal pollution is associated with:

• Oil spills

• Domestic sewage

• Power plants

• Agriculture

Drip irrigation is effective for:

• Reducing evaporation losses

• Flood control

• Power generation

• Filtration