Question

TASSAGE AND GIVE THE ANSWER FOR THE GIVEN QUEST
When magnesium is burned in air, a powdery ash X is formed . X on dissolving in water forms Y
1. What are X and Y?
2. What is the action of Y on litmus paper?
3. What conclusion do you get about the nature of Y form its action on litmus paper?
1. What is the common name of the indigestion-relieving medicine which contain Y?​

Answer 1

Explanation:

conclusion of burning cotton

Answer 2

Answer:

1. The X is magnesium and Y is magnesium

hydroxide.

• When the magnesium burn into air, an oxide react take place and the atmospheric oxygen combine with the magnesium in other to form magnesium oxide.(Magnesium oxide is powdery)

$\fbox{${{2}{mg}\mathrm{{+}}{O}{2}\mathrm{{-}}{\mathrm{>}}{2}{mgO}}$}$

• Now, when the magnesium oxide reacts with water,it forms magnesium hydroxide.

$\fbox{${{mgO}\mathrm{{+}}{H}{2}{O}\mathrm{{-}}{\mathrm{>}}{mg}{\mathrm{(}}{OH}{\mathrm{)}}{2}}$}$

2. The Y or magnesium hydroxide turns the red litmus paper into blue litmus paper.

3. The Y or magnesium hydroxide is basic substance because it turns red litmus into blue litmus.

4. The Y or magnesium hydroxide containing medicine for indigestion, is known as the milk of magnesium.

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