Put some glucose in the flask and add a few crystals of sodium hydroxide. Add some water and shake the solution vigorously. On adding a few drops of methylene blue the solution will turn sky blue. On shaking the mixture will absorb oxygen and become dark blue. On keeping the flask still for a while the mixture will consume the oxygen and become colorless. You can repeat this a few times. This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner TATA Trust: Education is one of the k
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