Ozone & Protocols — Set 5
Environment · ओज़ोन और प्रोटोकॉल · Questions 41–50 of 50
Which international day is observed on September 16th?
Correct Answer: B. World Ozone Day
World Ozone Day commemorates the signing of the Montreal Protocol on this date in 1987. It is used to raise global awareness about the importance of the ozone layer. The UN officially recognized this day in 1994.
In which city was the landmark 1987 protocol for ozone protection signed?
Correct Answer: B. Montreal
The Montreal Protocol was signed in Montreal, Canada, by several nations. It set a precedent for using science to drive international environmental law. Today, it remains one of the most successful international agreements.
The term 'Good Ozone' refers to ozone found in which layer?
Correct Answer: A. Stratosphere
The correct answer is 'Stratosphere'. Stratospheric ozone is 'good' because it shields life from harmful UV rays. Tropospheric ozone, near the ground, is 'bad' because it acts as a pollutant. This distinction is important for understanding atmospheric chemistry.
Which man-made chemical was most widely used in old refrigerators and air conditioners?
Correct Answer: B. CFCs
Chlorofluorocarbons (CFCs) were popular refrigerants because they were non-toxic and stable. However, their stability allowed them to reach the stratosphere and destroy ozone. Most have now been replaced by safer chemicals.
The ozone layer absorbs most of the sun's harmful ____________ radiation.?
Correct Answer: B. Ultraviolet
Ozone acts as a filter for ultraviolet (UV) radiation from the sun. Without this shield, high levels of UV rays would reach the surface. This would be lethal or damaging to most living organisms.
Which continent is located directly under the largest annual ozone hole?
Correct Answer: C. Antarctica
The ozone hole forms primarily over Antarctica due to unique weather patterns and extreme cold. These conditions accelerate the chemical reactions that destroy ozone. The size of this hole is monitored annually by satellites.
A reduction in ozone levels can lead to an increase in which human health issue?
Correct Answer: B. Skin Cancer
Increased UV radiation reaching the skin is a major cause of skin cancer. It can also cause eye damage like cataracts and weaken the immune system. This is why international protocols focus on ozone recovery.
Which convention provided the framework for the Montreal Protocol?
Correct Answer: A. Vienna Convention
The 1985 Vienna Convention was the first step toward global ozone protection. It led directly to the creation of the more specific Montreal Protocol. Both work together to manage ozone-depleting substances.
What is the primary goal of the Kigali Amendment (2016)?
Correct Answer: B. To phase out HFCs
The Kigali Amendment aims to reduce the use of hydrofluorocarbons (HFCs), which are strong greenhouse gases. While HFCs don't hurt ozone, they do contribute to global warming. This update shows how the Montreal Protocol now also helps fight climate change.
Which of these is the most effective way to help the ozone layer recover?
Correct Answer: B. Reducing the use of CFCs and other ODS
The correct answer is 'Reducing the use of CFCs and other ODS'. Stopping the release of Ozone Depleting Substances (ODS) is the only direct way to stop thinning. Because these chemicals last a long time, the layer takes decades to heal. Global cooperation has already led to signs of recovery.