Question

UV radiation from sunlight causes a reaction which produces
A. $O_3$
B. $SO_2$
C. CO
D. $CH_4$

Answer 1

Hint: UV radiation isn't ionizing radiation as its photons do not have the energy to ionize molecules, it can cause synthetic responses and makes numerous substances glow or fluoresce.

Complete answer:
Ultraviolet radiation is electromagnetic radiation with a wavelength from 10-400 nm. It has a wavelength shorter than that of visible light, but longer wavelength than X-rays. UV radiation is present in sunlight. It is also produced by electric arcs, mercury-vapor lamps, tanning lamps, and black lights. Short-wave UV harms DNA and sterilizes surfaces with which it comes into contact.

In the lower atmosphere, early oxygen comes from nitrogen dioxide. Oxygen particles split under UV radiations to create oxygen atoms which join with sub-atomic oxygen to form ozone. It is this gas which shapes the defensive ozone umbrella in the stratosphere and shield life from high energy UV radiations. It can likewise harm DNA particles and cause carcinogenesis.

Option A: Bright radiations cause a photochemical parting of oxygen atoms in the stratosphere. In the lower atmosphere, early oxygen comes from nitrogen dioxide. The nascent oxygen consolidates with sub-atomic oxygen to frame ozone. Therefore this is the correct option.

Option B: Sulphur dioxide is produced from the burning of fossils. Sulfur dioxide absorbs UV radiation with that wavelength very strongly and prevents it from escaping to space. In the presence of sunlight, sulfur dioxide can mix with oxygen and water vapour to produce volcanic smog. Therefore this is an incorrect option.

Option C: Carbon monoxide is produced from automobile emissions. It reacts readily with haemoglobin and can cause carbon monoxide poisoning. Therefore this is an incorrect option.

Option D: Methane is a greenhouse gas which is produced by coal, natural gas, and oil. Therefore this is an incorrect option.

Hence, the correct answer is option (A)

Note: UV radiation from sunlight causes a reaction which produces ozone (O3). This protects us from the harmful UV rays of the sun. For humans, suntan and burn from the sun are natural impacts of responses of the skin to UV light, alongside an expanded danger of skin malignancy.