What more than food and water you need to survive “Oxygen”.Its role in the survival of many forms of life elevates its significance.

No one can live without sufficient quantity of food, water and oxygen.Have you ever imagined what if oxygen from the Earth was lost for 5 seconds?If you think, nha I’ma justs hold my breath for 5 sec and nothing will happen! then change your thinking.

So what would happen if the entire planet lost oxygen for five seconds?

veryone at the beach would get sunburns. Ozone is molecular oxygen and blocks the majority of UV light. Without it, we are toast.
The daytime sky would get darker. With fewer particles in the atmosphere to scatter blue light, the sky would get a bit less blue and a bit more black.
Every internal combustion engine would stall. This means that every airplane taking off from a runway would likely crash to the ground, while planes in flight could glide for some time.
All pieces of untreated metal would instantly spot-weld to one another.This is one of the more interesting side effects. The reason metals don’t weld on contact is they are coated in a layer of oxidation. In vacuum conditions, metal welds without any intermediate liquid phase (Cold welding).
Everyone’s inner ear would explode. As mentioned, we would lose about 21 percent of the air pressure in an instant, equivalent to being teleported to the top of the high Andes (elevation, about 2,000 meters).
Every building made out of concrete would turn to dust. Oxygen is an important binder in concrete structures (really, the CO2 is), and without it, the compounds do not hold their rigidity.
Every living cell would explode in a haze of hydrogen gas. Water is one third oxygen; without it, the hydrogen turns into gaseous state and expands in volume.
The oceans would evaporate and bleed into space. As oxygen disappears from the oceans’ water, the hydrogen component becomes an unbound free gas. Hydrogen gas, being the lightest, will rise to the upper troposphere and slowly bleed into space through Atmospheric escape.
Everything above ground would immediately go into free fall. As oxygen makes up about 45 percent of the Earth’s crust and mantle, there is suddenly a lot less “stuff” beneath your feet to hold everything up.

Let’s See What Will Happen Without Oxygen

source- Buzzfeed

Inshort-

After those 5 seconds, there will be a huge Explosion due to the oxidation of all the oceans that have been converted to Hydrogen (and any exothermic oxidation).
Rewinding back from this, Since energy can neither be created nor destroyed (not considering E=mc^2) in the first place,
The earth would suddenly become extremely cold for 5 seconds followed by a Big Bang.

Here another great story- Top 10 Ordinary Things That Look Insanely Cool Under Electron Microscope