Greenhouse Gases and Atmosphere

It is a greenhouse gas produced by paddy fields.

Gobar gas (biogas) primarily consists of methane (50-75%), which is produced by anaerobic decomposition of organic matter like cattle dung. Carbon dioxide makes up most of the remainder. The other options are incorrect - acetylene is a different hydrocarbon and lungs are organs.

Biogas primarily contains methane (50-75%), along with carbon dioxide and traces of other gases. Methane is the main combustible component that makes biogas useful as a fuel. Ethane, butane, and propane are higher hydrocarbons not typically found in significant amounts in biogas.

Methane is known as Marsh gas because it is generaly found in marshy areas.

Butane is the main constituent of LPG.

Carbon dioxide (CO2) is the most significant anthropogenic greenhouse gas, contributing approximately 76% of all greenhouse gas emissions from human activities. It is released primarily from burning fossil fuels. Chlorofluorocarbons are potent greenhouse gases but exist in much smaller quantities. Carbon monoxide is not a greenhouse gas. Freon is a brand name for CFCs.

Oxygen was largely absent in Earth's early atmosphere. With the evolution of photosynthetic plants (and earlier cyanobacteria), oxygen began accumulating as a byproduct of photosynthesis. This 'Great Oxygenation Event' dramatically changed Earth's atmosphere. Option D correctly identifies oxygen as the new gas.

CO2 is a primary greenhouse gas that absorbs and re-emits infrared radiation. Unlike O2 and N2 which are transparent to infrared, CO2's molecular structure allows it to trap heat.

Photosynthesis is the primary biological process that produces oxygen as a byproduct when plants, algae, and cyanobacteria convert CO2 and water into glucose. Combustion consumes oxygen, hydrolysis breaks molecules using water, and ammonification produces ammonia - none release oxygen into the atmosphere.

Combustion of fossil fuels and biomass releases carbon dioxide into the atmosphere. Fossilization removes carbon from the cycle, while nitrification and ammonification are parts of the nitrogen cycle.

Yes. nitrogen constitutes 78.08% of the atmospheric air.

This is largely responsible for the green house effect.The volume of other gases is constant but the volume of carbon dioxide has been rising in the past few decades mainly because of the burning of fossil fuels. This has also increased the temperature of the air.

Carbon dioxide is the primary greenhouse gas responsible for global warming. It is released through human activities like burning fossil fuels, deforestation, and industrial processes. CO2 traps heat in the atmosphere, causing the greenhouse effect and leading to global climate change. Noble gases like Helium, Argon, and Xenon are inert and do not contribute to warming.

Nitrogen (N2) is not a greenhouse gas because its molecular structure is symmetrical and non-polar, so it does not absorb infrared radiation. The other options - carbon dioxide, sulphur dioxide, and ethane - all have molecular structures that trap heat in the atmosphere, contributing to the greenhouse effect.

Global warming is the process of increase in earth's temperature due to an increase in air pollution. One of the major gases responsible for pollution is CO₂. Burning fossil fuels results in huge emissions of CO₂, which causes global warming.