manganese dioxide

Oxygen

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Preparation of Oxygen Oxygen Oxygen is prepared in lab generally in two ways either by the application of heat or no application of heat. Using heat: Oxygen in lab is prepared by heating the mixture of powdered potassium chlorate and manganese dioxide in the ratio 4:1 in a hard glass test tube. The oxygen gas … Read more Oxygen

13.06.18 APSC (Assam) Current Affairs

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ASSAM   Centre plans to set up coach maintenance facility in State   The Railway Ministry is considering setting up a coach maintenance facility in Assam.   It is noteworthy that a Coach Refurbishment Unit was approved at Bongaigaon last year with an investment of Rs 150 crore for daily upkeep of new-generation LHB coaches. … Read more 13.06.18 APSC (Assam) Current Affairs