Question

Potable water is the water which is
A.Obtained from a river
B.Obtained from a lake
C.Pure and fit for drinking
D.Used only for washing clothes

Answer 1

Water that is safe to drink or use for food preparation is referred to as drinking water. The amount of drinking water needed to be healthy varies, depending on physical activity, age, health-related concerns, and environmental factors. Working in a hot region may necessitate up to 16 litres (4.2 US gal) of water each day.

Complete answer:
Potable water is water that is safe to drink and is becoming increasingly rare across the world. Increased demand is putting a strain on freshwater supplies across the world, and a seemingly infinite array of pollutants may convert once-potable water into a health danger or just render it unattractive. Of the more than 2 billion people who do not have access to potable water at home, 844 million do not have even basic drinking water service, with 263 million having to travel 30 minutes to get water. Approximately 159 million people use untreated surface water. Diarrhea is a leading cause of death in children under the age of five, with an estimated 800,000 children under the age of five dying each year.
Potable water is water that is safe for humans and other animals to drink. It's also known as drinking water because of its intended usage. Water might be naturally drinkable, as in virgin springs, or it can be treated to make it safe to drink. In any case, the water's safety is determined by tests that check for potentially hazardous pollutants. Access to clean drinking water is considered a basic human right by the World Health Organization.
Hence option c is correct.
Potabilization procedures such as water softening, demineralization, dealkalization, deionization, and disinfection all involve ion exchange, a chemical process that swaps undesirable dissolved ions for similarly charged ions. For potable water production, specialized ion exchange resins targeted at particular pollutants such as nitrates, perchlorate, and uranium have become more common.

Hence option c is correct

Note:
Between 2000 and 2050, global demand for fresh water is expected to rise by 55 percent, and NASA scientists have discovered that freshwater supplies are being depleted faster than they are replenished. “The water table is decreasing all around the world,” Jay Famiglietti, a senior hydrologist at NASA, has warned. Water does not come in endless quantities.” Potable water is essential to human survival, and it will continue to be a problem for the foreseeable future.