sulphur dioxide animation

Sulphur and their Properties..

* Sulphur dioxide was known from ancient times and Romans used it as a general cleansing agent. * In 1770 , J.Priestly prepared the gas by the action of hot conc. Sulphuric acid on mercury and called it sulphurous aci..

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Occurrence of Sulphur Dioxide - Sulphur dioxide is present in volcanic gases; in hot aqueous springs surrounding volcanic regions; in areas where sulphur is extracted by melting it, and in places where coal containing sulphur or sulph..

Color - Sulphur dioxide is a colorless ga..

Sulphur dioxide has been known to people for ages. Sulphur used to be burnt to produce sulphur dioxide, which was then used as a fungicide and insecticide. Priestley prepared sulphur dioxide in the year 1774 by heating conc..

Sulphur dioxide is present in volcanic gases; in hot aqueous springs surrounding volcanic regions; in areas where sulphur is extracted by melting it, and in places where coal containing sulphur or sulphur compounds are burn..

Dry sulphur dioxide does not have any bleaching action. However, if the gas is moist, or if the object to be bleached is moist, then bleaching takes place. Usually only delicate articles such as coloured flowers, silk, wool etc., are bleached by sulphur dioxide..

Before catalytic oxidation of sulphur dioxide, impurities like dust, arsenic etc. have to be removed otherwise they spoil the catalys..

Bleaching Action of Sulphur Dioxide - Dry sulphur dioxide does not have any bleaching action. However, if the gas is moist, or if the object to be bleached is moist, then bleaching takes place. Usually only delicate articles such as coloured flowers, silk, wo..