60. (a) Copy and complete the following table. Column 3 has the names of gases to be prepared using the substance you enter in column 1 along with dilute or concentrated sulphuric acid as indicated by you in column 2. Column 1 Column 2 Column 3 Substance reacted with acid Dilute or concentrated sulphuric acid Gas Hydrogen Carbon dioxide Only chlorine   61. (b) Write the equations for the laboratory preparation of: (1) Sodium sulphate using dilute sulphuric acid.   62. (2) Lead sulphate using dilute sulphuric acid.