11. a) a balanced diet. and dissolve it in little water. Burn a small piece of Magnesium ribbon by holding it with tongs. Collect the white ash formed Test the solution formed with blue litmus and red litmus. Now answer the questions given below. i) What the aim of this experiment ? ii) Is the composition of the ash formed different from Magnesium ribbon ? If so, how ? iii) What substance is formed when the ash is mixed with water? iv) What inference can be made on the basis of this experiment ?
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[i] The aim of the experiment is to prove that metals combine with oxigen to form oxides.
[ii] Yes, the composition of ash is different from the magnesium ribbon. Magnesium combines with oxygen to form magnesium oxide which is completely different from the elemental magnesium.
[iii] Magnesium hydroxide is formed when the ash is mixed with water.
[iv] We can make the interference that this is oxidation and a chemical reaction where magnesium combines with oxygen to form magnesium oxide which is a base and turns red litmus blue.
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