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In 2002 AD,CFC concentration of atmosphe...

In 2002 AD,CFC concentration of atmosphere was

A

261 ppt

B

326 ppb

C

1750 ppb

D

368 ppm.

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The correct Answer is:
To solve the question regarding the concentration of CFC in the atmosphere in 2002 AD, we can follow these steps: ### Step-by-Step Solution: 1. **Understand CFC and its Impact**: - Chlorofluorocarbons (CFCs) are chemical compounds that have been used in various applications, such as refrigerants and aerosol propellants. They are known to deplete the ozone layer when they break down in the atmosphere. 2. **Identify the Year in Question**: - The question specifically asks for the concentration of CFCs in the atmosphere in the year 2002 AD. 3. **Recall Relevant Information**: - It is important to remember that CFCs release chlorine atoms when they are exposed to ultraviolet (UV) light. These chlorine atoms react with ozone (O3) molecules, leading to ozone depletion. 4. **Find the CFC Concentration for 2002**: - According to the information provided, the concentration of CFCs in the atmosphere in 2002 AD was 261 ppt (parts per trillion). 5. **Evaluate the Options Given**: - The options provided are: - 261 ppt (correct) - 326 ppb (incorrect) - 1750 ppb (incorrect) - 368 ppm (incorrect) - Since the concentration of CFCs in 2002 AD is confirmed to be 261 ppt, this is the correct answer. 6. **Conclude the Answer**: - Therefore, the concentration of CFC in the atmosphere in 2002 AD was **261 ppt**. ### Final Answer: **261 ppt** ---
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