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Q1. Chemicals

This chemical compound is a gas that plays a significant role in atmospheric chemistry.
It contains nitrogen and oxygen atoms bonded together in its molecular structure.
Its chemical formula is NO2 and it appears as a reddish-brown gas at room temperature.
It's a major air pollutant produced by combustion engines and power plants.
It contributes to the brown haze seen over cities and forms acid rain with water.

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Out of hints! It was nitrogen dioxide! 💨

The correct answer is Nitrogen Dioxide.

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nitrogen dioxide
2026-09-01
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