Air Pollution MCQ — 5 Practice Questions with Answers

Explanation

Haryana recorded an AQI of 402 (Severe) during Diwali 2025. Uttar Pradesh hit 350 (Very Poor) and Punjab 320 (Very Poor). The CPCB national average was around 280, with Delhi's October 2025 AQI the worst in three years.

Explanation

The draft Delhi EV Policy proposes to phase out the registration of new petrol two-wheelers by 2028 as a major air-quality intervention, recognising that two-wheelers are among the largest contributors to vehicular pollution in Delhi.

Explanation

The Commission for Air Quality Management (CAQM) invoked Stage-II of GRAP in Delhi-NCR on October 19, 2025 as the AQI crossed 300 ('Very Poor'). Stage-I had been invoked earlier on October 14 when AQI crossed 200 ('Poor').

Explanation

Delhi's AQI crossed 300 on Diwali morning (October 20) and peaked at 451 ('Severe') by the next morning, with PM2.5 reaching 262 micrograms per cubic metre — over 59 times the WHO annual guideline.

Explanation

Low wind speeds of around 5 km/h during Diwali 2025 trapped PM2.5 particles from fireworks and stubble burning, causing Delhi's AQI to peak at 451 (Severe) by October 21 morning.