Bissoy.com
Doctors Medicines MCQs Q&A

What is the significance of Ozone layer in atmosphere?

What is the significance of Ozone layer in atmosphere? Correct Answer It filters the ultraviolet rays of the sun

The correct answer is option 3 i.e It filters the Ultraviolet rays of the sun.

  • The ozone layer is found in the upper part of the atmosphere called the stratosphere.
  • It acts as a shield absorbing ultraviolet radiation from the Sun. Hence option 3 is correct.
  • UV rays are highly injurious to living organisms since DNA and proteins of living organisms preferentially absorb UV rays, and its high energy breaks the chemical bonds within these molecules.
  • The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Dobson units (DU).
  • Ozone gas is continuously formed by the action of UV rays on molecular oxygen and also degraded into molecular oxygen in the stratosphere.
  • The Montreal Protocol is an international treaty, was agreed on 16th September 1987, and entered into force on 1st January 1989, designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion.
  • International Day for the preservation of Ozone Layer is celebrated on 16th September every year.
  • The theme for 2019 was Ozone day "32 years and healing".

Related Questions

Consider the following statements: 1. Ozone is found mostly in the Stratosphere. 2. Ozone layer lies 55 - 75 km above the surface of the earth. 3. Ozone absorbs ultraviolet radiation from the Sun. 4. Ozone layer has no significance for life on the earth. Which of the above statements are correct?
Which of the following statements is/are correct concerning Ozone gas? 1. Good ozone is found in the upper part of the atmosphere called the Troposphere. 2. The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Dobson units (DU).  3. Research indicates that depletion of the stratospheric ozone layer is being reduced worldwide.  Select the correct answer using the code given below.
Which of the following represent represents correct matching of the layers of atmosphere. A. Exosphere (i) Layer help in radio transmission. B. Troposphere (ii) Upper most layer of atmosphere. C. Stratosphere (iii) Lower most layer of atmosphere D. Thermosphere (iv) Layer contains ozone gas.
Some small cubes of same height 7 cm but variable length and width are put inside a large cuboid of height 21 cm. Length and width of cuboid is 32 cm and 24 cm, respectively. Small cubes are put such that cubes at the bottom most layer is of similar base area; second layer contains all the cubes of similar base area and third layer have all the cubes of similar base area. Which of the following statement(s) given below is / are TRUE? A: If side of each small cubes at bottom most layer is 8 cm, then maximum number of small cubes that can be put at bottom most layer is 12. B: If maximum of 48 cubes can be put at second layer, then side of each cube at second layer is 6 cm. C: If side of each small cubes at third layer is 1.6 cm, then maximum number of small cubes that can be put at third layer is 300.
Which assumptions are implied from the below statement? Statement: Ozone layer depletion is caused by excessive Chlorofluorocarbons which are majorly emitted by refrigerants and air conditioners. Assumptions: I: Reducing the use of refrigerants and air conditioners will protect the ozone layer. II: The ozone layer is beyond saving now.
Which of the following statement is are correct? (1) Water vapor in the atmosphere increases with altitude. (2) Ozone Layer is found in stratosphere where airplanes fly. (3) Rotation of earth, its angle of inclination, and transparency of the atmosphere are associated with insulation of the surface of the earth. (4) Exosphere is the atmospheric layer which reflects radio waves
Consider the following statements  1. Montreal Protocol was signed in 1987 for Ozone layer depletion protection. 2.World Ozone day is celebrated on 22nd March. 3.Ozone is a Greenhouse gas responsible for Global Warming. Which of the statements given above is/are correct?
Ozone-depleting substances are chemicals that destroy the ozone layer that protects the earth. Which of the following is not an ozone-depleting substance.
What is the physical significance of the Ozone layer in the atmosphere?
Why ozone present in the ozone layer of the atmosphere is important?