Innovation week-Quiz

Which of the following salts is the main cause of permanent hardness of water?

• Magnesium sulphate

• Calcium sulphate

• Calcium carbonate

• None of these

According to the Geological survey, water with less than 1000 ml/litre of total dissolved solids is

• Slightly saline

• Moderately saline

• Freshwater

• Brine water

When ice melts, its density_________?

• Decreases

• Remains the same

• Becomes Zero

• Increases

Where does our home waste water should go?

• Sewage

• Open Desert

• Evaporation pond

• Irrrigation

The ground water-bearing layer of the earth which is below the water table is?

• Water table

• Aquifer

• Sea-level

• None of these

When was World Water Day first celebrated?

• 1973

• 1983

• 1993

• 2003

Which one of the following gases is used for the purification of drinking water?

• Sulfur dioxide

• Flourine

• Carbon dioxide

• Chlorine

What percentage of the earth is covered with water?

• 41

• 51

• 61

• 71

The process of seeping water into the ground is called

• aquifer

• precipitation

• infiltration

• depletion

Which country has the largest total renewable water resources?

• India

• Brazil

• Philippines

• China