Question

25. When magnesium is burnt in air, a powdery ash is formed X. X, on dissolving in water
forms “Y'.
a) What are “X” and “Y’?
b) What is the action of Y on the litmus paper?
c) What is the common name of the indigestion relieving medicine which contains Y?​

Answer 1

Answer:

Magnesium when burnt in air combines with oxygen and form magnesium oxide (MgO).

a)X=MgO

MgO+H2O=Mg(OH)2

Y=Mg(OH)2

b)As magnesium hydroxide is basic in nature it turns the red litmus paper to blue.

c) Antacid