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Direction: Read the following passage carefully:
Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.
The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).
The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.
There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.
However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.
However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.
Q. The AQI levels after Diwali this year were
  • a)
    the same as in other years.
  • b)
    higher than other years.
  • c)
    lower than other years.
  • d)
    could not be ascertained.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Direction:Read the following passage carefully:Delhi tried very hard, ...


Explanation:

Key Points:

- The AQI levels after Diwali this year were lower than other years.
- The average AQI this year was 326, while in the previous years it was 426 and 327.
- Despite spikes in PM 2.5 and PM 10 levels, the overall AQI was better this year.
- Factors such as wind speed, crop stubble burning, and weather conditions affect air quality.
- The data shows that people are willing to make changes for better air quality.
- The mixing height recorded before Diwali was lower than the required level for correct dispersion.

Explanation in Detail:

After Diwali this year, the Air Quality Index (AQI) levels in Delhi were lower compared to the past two years. The average AQI this year was 326, while last year it was 426 and the year before that it was 327. Despite spikes in levels of PM 2.5 and PM 10 pollutants, the overall air quality was better this year. This improvement can be attributed to various factors such as the willingness of people to make changes for better air quality, even if it means breaking traditions like bursting firecrackers.

However, it is important to note that there are several factors that impact air quality, including wind speed, crop stubble burning in neighboring states, and weather conditions. The data also indicated that the mixing height, which is crucial for the dispersion of pollutants, was below the required level in the days leading up to Diwali. This shows that while progress has been made in improving air quality, there are still challenges to address to ensure a healthier environment for all.
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Community Answer
Direction:Read the following passage carefully:Delhi tried very hard, ...
The passage states that despite the unfavorable weather conditions, this year's Air Quality Index (AQI) was better than the past two years. It mentions that the city's average AQI at Diwali last year was in the "serious" category at 426, and the year before was in the "very poor" category at 327. This time, it was marginally lower at 326.
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Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer?
Question Description
Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11. Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Direction:Read the following passage carefully:Delhi tried very hard, but it was not enough. In the run up to D-Day, the sound of firecrackers had not been heard. The Supreme Court’s ban on its sale had made it difficult to acquire, but many people, including schoolchildren, had decided to break tradition for clean air. And until 7 pm on Diwali, most neighborhoods were quiet. Around that time the first sound of firecrackers exploding was heard, slowly building to a crescendo. But it was nowhere near the blitzkrieg of the past, not even half of it. And long before midnight, it was all over.The bad news broke at dawn. It was a visibly smoggy morning. Air pollution levels peaked on Diwali night and remained dangerously high through Friday afternoon, as reflected in real-time monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC).The CPCB, however, pointed to a silver lining. He said this year’s Air Quality Index (AQI) was better than Diwali’s in the past two years despite the harsh weather conditions. At Diwali last year (October 30, 2016), the city’s average AQI was in the “serious” category at 426, while the year before (November 11, 2015), it had been in the “very poor” category. ” at 327. This time, it was marginally lower at 326.There are so many factors that affect air quality, from wind speed and direction to crop stubble burning in neighboring states, that it’s hard to definitively identify the main culprit. What must be recognized, however, is that at least most people are willing to stick with what may seem like unpleasant decisions for a better quality of life.However, the data is troubling informed observers, particularly the massive spikes in levels of PM 2.5 (respirable fine particulate matter pollutants) and PM 10 (coarse particulate matter pollutants) on Thursday night after 10 p.m. p.m. Delhi peaked at 656 micrograms per cubic meter around midnight.However, the data also shows that despite unfavorable weather conditions, the air quality at Diwali this year was better than last year. It hadn’t been as good in the two days before Diwali due to the intrusion of humid air from the southeast, coupled with prevailing calm wind conditions. The average mixing height (the height at which smoke or air rises, mixes and disperses) recorded on October 18 and 19 was 547 meters and 481 meters, respectively, according to the CPCB. It must be at least 1000 meters for a correct dispersion.Q.The AQI levels after Diwali this year werea)the same as in other years.b)higher than other years.c)lower than other years.d)could not be ascertained.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 11 tests.
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