Advertisements
Advertisements
प्रश्न
Give the main experimental points only to demonstrate that magnesium.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
A metal highly resistant to rusting.
The process by which oxidation of food in our body takes place is
Fill in the blank by choosing the correct word from the given list.
List: oxygen, carbonic, suIphur dioxide gas, precipitation, helium
____________ gas can cause acid rain.
What happens when potassium nitrate is heated ?
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 __________________.
Write fully balanced equation for the following :
MgO + H2O →
State two most important conditions for rusting.
Write the balanced chemical equation of the manganese dioxide.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Name the catalyst used in the preparation and state it’s function.
In Rockets, along with fuel, oxygen is also carried for combustion – why?
