Question

7. A metal ‘X’ is burnt is air to form a white powdery ash of a compound ‘Y’. When the ash is dissolved in water it forms a new substance ‘Z’. What are X, Y and Z? Write the chemical equations involved their formation.
plz tell fast....​

Answer 1

QUESTION:

• A metal ‘X’ is burnt is air to form a white powdery ash of a compound ‘Y’. When the ash is dissolved in water it forms a new substance ‘Z’. What are X, Y and Z? Write the chemical equations involved their formation.

ANSWER:

a) Metal "X" is Magnesium (Mg).

b) Powder "Y" is Magnesium oxide, (MgO).

c) The substance with which metal "X"combines to form powder "Y " is Oxygen (of air), O 2

d) Substance "Z" is Magnesium hydroxide Mg(OH) 2

• Used as an antacid to relieve indigestion.

Used as an antacid to relieve indigestion.e) 2Mg+O 2 →2MgO (powder)