What is Sulfur Dioxide and How is it Used?
It is commonly known as sulfurous oxide with chemical formula SO2. The source of SO2 is burning of fossil fuel , extracting metal from ore & volcanic eruption. In laboratory sulphur dioxide is prepared by copper turnings & Concentrated Sulfuric acid. It in colourless gas, pungent odor. It dissolves in water very easily. It has a weak acidic nature. It act as a reducing agent in many reaction. It is a toxic gas.
The direct inhalation of sulphur dioxide cause irritation to eyes, nose & throat. It is also use as bleaching agent. The molecular mass in 64.066 g /mol. It is widely used in food & drinks industries as a preservative . It does not support combustion nor is it combustible.
Uses:-
• disinfectant
- a refrigerant
- manufacture Sulfuric acid
- manufacturing paper.
FAQ
i) What is the shape of molecule?
Ans: It is bent shape molecule in which sulphur is bonded with single and double bonds with an oxygen.
ii) How does SO2 formed in laboratory?
Ans: The reaction between metallic sulphite (say for example Na2SO3) and acid which produced sulphur dioxide, metallic sulphate i.e sodium sulphate and water.
iii) SO2 is a strong oxidising agent or not? Give example.
Ans: It is a strong oxidising agent .
Eg- 2H2S + SO2 →3S + 2H2O
iv) What happens when sulphur dioxide reacts with water?
Ans: It forms Sulphurous acid (H2SO3).
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