Question

The ozone layer protects the earth from harmful __________
A. Infrared rays
B. Ultraviolet rays
C. Cosmetic rays
D. Gamma rays

Answer 1

Hint: The ozone layer protects the earth from harmful rays emitted by the sun. It has a wavelength of 10-400nm.
-It causes skin cancer and tanning when exposed for a long time.
-It lies between the frequency of visible light and X-rays.

Complete answer:
The ozone layer goes about as a channel of protection from the high frequency and harmful bright radiation known as the ultraviolet rays from the sun.
It shields life on Earth from its conceivably hurtful impacts. At the point when the sky is clear, there is a reverse connection between stratospheric ozone and sun-powered UVR estimated at the Earth's surface.
Ozone is a sort of vaporous compound. It is produced using the blend of three oxygen iotas. Subsequently, the substance equation of this compound is $O_3$. The development of $O_3$ is a two-venture response.
In the initial step, the oxygen particle is separated into oxygen iotas with the assistance of daylight.
In the subsequent advance, the impact of oxygen particles with another oxygen molecule prompts the development of ozone.

Hence the correct answer is option B.

Note: Excessive exposure to UV radiation for a more extended timeframe can cause melanoma or skin malignancy in people. It can cause numerous different types of malignant growth and different infections. In general exorbitant UV radiation is a danger to any living life form. Consequently, it is fundamental to keep up and secure the ozone layer.
The depletion of the $O_3$ layer is a result of the presence of specific synthetics in the stratosphere of the earth's air. The consistent arrival of mixes like carbon tetrachloride, carbon tetrafluoride, CFCs (chlorofluorocarbon) or freons, and other chlorine or bromine-containing incandescent light in the climate is the principle explanation behind the consumption.