GATE Air and Noise Pollution: Atmosphere and Air Quality – Previous Year Questions
10 GATE previous year questions on Atmosphere and Air Quality (Air and Noise Pollution, Environmental Science and Engineering) with answers and explanations, from every paper.
- GATE 2021 ES Q14 – An air sample has 30 ppmv CO at 25°C in the morning. The same sample is analysed at 35°C later. What is its CO concentration in ppmv?
- GATE 2021 ES Q47 – Which are primary air pollutants?
- GATE 2021 ES Q53 – At NTP298 K,1 atm, air contains .30 ppmv NO₂. One mole ideal gas occupies24.45 L;NO₂ molar mass46 g/mol. Find NO₂ concentration in µg/m³,rounded to an…
- GATE 2022 ES Q48 – Temperature–height profiles P, Q, R are shown. For ground-level emissions, select correct statements.
- GATE 2023 ES Q59 – A 30 m³ room has ventilation500 m³/hour in/out and initially negligible VOC. A stove burns.25 kg wood/hour, emitting.2 gVOC/kg. VOC reacts first-order…
- GATE 2024 ES Q19 – Environmental temperature increases6°C/km with altitude. Which atmospheric condition is this?
- GATE 2024 ES Q52 – Convert120 ppbv ozone at 1 atm and 25°C to µg/m³,to one decimal. Use oxygen atomic weight16 and R=8.314 J/(mol·K).
- GATE 2025 ES Q41 – At 1 atm and 25°C, a pollutant concentration of 365 µg/m³ corresponds to 139 ppb. Atomic weights are C12,H1,O16,N14,S32. Which pollutant is the…
- GATE 2026 ES Q22 – Which is the general decreasing order of atmospheric gas abundance?
- GATE 2026 ES Q49 – At 1 atm and 300 K, air contains 340 ppmv CO 2. Assuming ideal gases, find its concentration in mg/m³,to two decimals. Use molecular weight 44 g/mol…