SSC MTS EXAM

Detailed explanation-1: -Oxygen is the most abundant element contained within living organisms, composing about 65% of the whole-body mass. Oxygen’s presence within the body is essentially stored in the form of water molecules, which is employed to supply the energy within the body needed to sustain life.

Detailed explanation-2: -Oxygen is by far the most abundant element in the Earth’s crust, accounting for 46 percent of the total mass. Oxygen is a highly reactive element that forms oxides when it reacts with other elements.

Detailed explanation-3: -It is the second most abundant element in the Earth’s geosphere after iron and the most abundant element by mass in the Earth’s crust-at about 47% to 49%. Oxygen makes up about 89% of the world’s oceans, and diatomic oxygen gas constitutes about 20% of the Earth’s atmosphere-second only to nitrogen.