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प्रश्न
Give the main experimental points only to demonstrate that magnesium.
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उत्तर
Experiment to show that magnesium gains weight on burning:
Take dry crucible with lid. Put a small piece of magnesium in it and cover the lid. Find its weight with lid covering it. Let it be 50 gms.
Now heat the crucible along with magnesium and lid just opened for a while. Taking care that no ash comes out. Let it cool covering the lid and products formed weight it again. The weight now will be more. Let it be 50.82 gms, oxygen combined is 50.82 – 50 = 0.82 gms this shows that something is added to magnesium, which has increased its weight. This 0.82 gm is the weight of oxygen added to magnesium.
2Mg + O2 → 2MgO
Hence magnesium gains weight on burning.
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संबंधित प्रश्न
A metal highly resistant to rusting.
What do you observe when Magnesium is heated and then tested with moist blue and red litmus – paper?
State two differences between:
Rusting and burning.
What happens when Sodium burns in oxygen ? Also give the balanced chemical equation for the reaction.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
To prevent rusting, the underside of the ships is coated with __________________.
What is rusting?
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Draw a neat labelled diagram for the method used in the above preparation.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Name the catalyst used in the preparation and state it’s function.
Distinguish between:
Combustion and Respiration
What is meant by burning?
