SarkariPYQ

SSC Selection Post 2025 PYQ — Question 9

SSC Selection Post - Matriculation Level - 30th July 2025 - Shift 1 • General Awareness • Q9

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Fill in the blank:
The National Air Quality Index (AQI) is measured using ______ number of pollutants.

Show answer & explanation

Correct answer: D

Explanation

Correct Answer

Eight

Explanation

India's Air Quality Index (AQI) is measured using 8 pollutants:

  • PM10

  • PM2.5

  • NO₂

  • SO₂

  • CO

  • O₃

  • NH₃

  • Pb (Lead)

The AQI shows the level of air pollution and helps people understand its impact on health.

Key Points

  • AQI was launched in 2014.

  • It was introduced by the Ministry of Environment, Forest and Climate Change (MoEFCC).

  • AQI has 6 categories:

    • Good

    • Satisfactory

    • Moderately Polluted

    • Poor

    • Very Poor

    • Severe

  • CPCB monitors air quality in India along with State Pollution Control Boards (SPCBs).

Important Questions and Answers

Question: How many pollutants are used to calculate AQI in India?

Answer: Eight.

Question: Which organization monitors air quality in India?

Answer: Central Pollution Control Board (CPCB).