Ozone Layer and Ozone Hole Study 2020-22
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Questions and Answers

What is the main purpose of removing nitrogen compounds related to the impact of chlorine?

  • To exacerbate the ozone layer depletion caused by chlorine
  • To accelerate the destructive impact of chlorine
  • To neutralize the impact of chlorine on the ozone layer
  • To moderate the destructive impact of chlorine (correct)

What led to the potential ozone loss in the stratosphere after the 1991 Mt. Pinatubo eruption?

  • Increased atmospheric abundance of Carbon tetrachloride
  • Excessive use of Halons
  • Changes in solar cycle
  • Impact of Volcanic eruptions (correct)

Which compound used as a blowing agent was completely eliminated by India under the Montreal Protocol?

  • Halons
  • HFCs
  • CFC
  • HCFC 141b (correct)

What is the main focus of India Cooling Action Plan (ICAP) regarding cooling technology?

<p>Enhancing energy efficiency in cooling systems (D)</p> Signup and view all the answers

Which protocol's targets did India surpass according to the report by the Ministry of Environment and UNDP?

<p>Montreal Protocol (C)</p> Signup and view all the answers

What is the goal of India in relation to HCFC phase-out from new equipment manufacturing by December 2024?

<p>Phase out HCFCs completely by 2030 (C)</p> Signup and view all the answers

What percentage of Earth's ozone resides in the stratosphere?

<p>Nearly 90% (A)</p> Signup and view all the answers

Which region experiences exceptionally depleted ozone in the stratosphere?

<p>Antarctica and Arctic (D)</p> Signup and view all the answers

What are some major ozone-depleting substances (ODSs) mentioned in the text?

<p>Chlorine, bromine, CFCs, carbon tetrachloride, halons (B)</p> Signup and view all the answers

Which process results in the destruction of ozone in the stratosphere?

<p>Catalytic cycles (B)</p> Signup and view all the answers

What is the average thickness of the ozone layer over Earth as mentioned in the text?

<p>300 Dobson Units (A)</p> Signup and view all the answers

What can destroy ozone in the stratosphere by providing a surface that converts benign forms of chlorine into reactive, ozone-destroying forms?

<p>Polar Stratospheric Clouds (PSCs) (B)</p> Signup and view all the answers

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