Question

The purest form of water that is considered to be____________.
A.Tap water
B.Water from wells
C.Bore water
D.Rain water

Answer 1

Hint:We need to know what are the characteristics of water which makes it pure. About $71\% $ of the earth surface is covered with water out of which only a small percentage is considered to be pure. Pure water is water which is suitable for drinking and other life purposes. It is called pure if it is free from impurities and safe for all forms of life. Water has the capacity to dissolve various amounts of substances in them, be it harmful or beneficial and therefore difficult to find the purest form of water.

Complete answer:
Let us evaluate the purity of the different sources of water:
Tap water: Tap water is basically water stored in tanks and used for either drinking, washing, cooking or other daily activities. The tanks used to store are often not cleaned and thus can have a large amount of impurities such as micro-organisms and hence cannot be the purest form of water.
Water from wells: We need to know that the wells are structures built by digging to have access to groundwater. Many essential and harmful minerals may be present in groundwater along with microorganisms. Hence groundwater cannot be considered as the purest form of water.
Bore water: We know that the bore water is also ground water which is accessed by digging a bore underground and using pumps to pump out the water. Similar to the well water, it is also impure due to the presence of minerals and micro-organisms.
Rain water: As we know that the rain water comes from the condensation of water through the water cycle. The water evaporated from various natural water sources. The impurities are removed during the evaporation process and the pure water falls to the surface of the earth in the form of rain. Hence it is the purest form of water.
Therefore, the correct option is option (D).

Note:
It must be noted that impure water can be purified for daily life purposes as rain water is not abundant and storing rain water is not much efficient as micro organisms are available everywhere which can make it impure. One of the cheapest and most convenient methods of purifying impure water is boiling. Filtration using appropriate filters is also efficient to purify water. Other options include distillation and chlorination.