✅ আণবিক ভর 44 বা এর থেকে কম হলে সেটি প্রাইমারি বায়ু দূষক।

✅ আণবিক ভর 44 এর বেশি হলে সেটি সেকেন্ডারি বায়ু দূষক।


⭐ প্রাইমারি বায়ু দূষক: CO, CO2, SO2(ব্যতিক্রম), NO, NH3, H2S , ধূলিকণা, ধোঁয়া, ছাই, হাইড্রোকার্বন।

⭐ সেকেন্ডারি বায়ু দূষক: SO3, H2SO4 বাষ্প, NO2, N2O5, PANs (পারঅক্সি অ্যাসাইল নাইট্রেট)

🛑 আরো এক ভাবে মনে রাখতে পারো,
প্রাইমারি বায়ু দূষকের ক্ষেত্রে NH3 বাদে কোনো দূষকের শেষে 2 এর বেশি নাই [CO, CO2,SO2,NO,H2S]
এবং
সেকেন্ডারি বায়ু দূষকের ক্ষেত্রে NO2 ব্যতীত কোন যৌগের শেষে 3 এর কম নেই [SO3, H2SO4 বাষ্প, N2O5]

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