Question

You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature.

wnt according to CBSE, NCERT
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Answer 1

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AIM :

To test the nature of oxides formed by metals and non-metals.


MATERIALS REQUIRED:

Sulphur powder, Mg ribbon, water, blue litmus paper, red litmus paper.


PROCEDURE :

1.Take magnesium ribbon with a pair of tongs and burn it in flame in the presence of air.

2.Collect the product formed and dissolve it in warm water.

3.Add red litmus paper into it.

4.Observe the change in colour and decide the nature of the oxide formed.

5.Burn sulphur in a deflagrating spoon in the presence of air and dissolve the oxide formed in

water.

6.Dip blue litmus paper into the solution and observe the changein the colour and decide the

nature of the oxide formed.


OBSERVATION:

The oxide formed by metal turns red litmus blue whereas oxide of non-metal turns blue litmus red.


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Answer 2

ANSWER___✒️

Take a small piece of magnesium ribbon on a deflagrating spoon and burn the ribbon. Magnesium burns in air to form magnesium oxide. Put the spoon in a gas jar. When the burning stops, remove the spoon and add water and dip neutral litmus paper in the jar. The color of litmus paper will change from violet to blue which shows that magnesium oxide (metal oxide) is basic.
Now, take a sulphur powder in a deflagrating spoon and burn it. Sulphur burns in air to form sulphur dioxide. Put the spoon in a gas jar.When the burning stops, remove the spoon and add water and dip neutral litmus paper in the jar.
The colour of litmus paper will change from violet to red which shows that sulphur dioxide (non-metal oxide) is acidic.

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