Question

Write about Carbon Dioxide CO2 and its basic properties and actions, uses

Answer 1

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• Carbon dioxide is a colourless gas present in atmosphere.
• It occurs naturally in Earth'satmosphere.
• Carbon dioxide contains carbon.
• It is a chemical compound composed of Carbon and two oxygen atoms.
• Its chemical formula " CO2 "

Physical Properties :-

1. Melting point => 55.6° C
2. Boiling point => 78.5°C
3. Density => 1.977

Chemical properties :-

1. It is a linear covalent molecule.
2. It is an acidic oxide and reacts with water to give carbonic acid
3. It reacts with alkalis metals to give carbonates and bicarbonate.

Uses :-

• Used to neutralise alkaline water.
• Used for refrigerating and cooling.
• Used as inert gas in Chemical processes.

Answer 2

Carbon dioxide is one of the most abundant gasses in the atmosphere. Carbon dioxide plays an important part in vital plant and animal process, such as photosynthesis and respiration.

• Green plants convert carbon dioxide and water into food compounds, such as glucose, and oxygen. This process is called photosynthesis.

• The reaction of photosynthesis : $\rm{6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2}}$

• Carbon dioxide (CO2) is an important heat-trapping (greenhouse) gas, which is released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions.