Write down the balanced equations for the reaction when:
Calcium phosphate is heated with a mixture of sand and carbon;

How will you prepare bleaching powder from slaked lime.

Write down the balanced equations for the reaction when:
An alkaline solution of potassium ferricyanide is reacted with hydrogen peroxide.

Give reasons of the following:
Sodium carbonate is made by Solvay process but the same process is not extended to the manufacture of potassium carbonate.