2. burning of lime stone to give calcium oxide
is:
a) oxidation process b) redox process
c) disproportionation d) decomposition
the vidation state of

d) decomposition

Explanation:

Burning of limestone is a decompostion reaction. In a decomposition reaction, there is formation of two or more products from a single reactant. The main driving force of such a reaction is the high positive heat of formation of the compound.

The reaction is stated below:

          CaCO₃   →   CaO + CO₂

Here, limestone is cracked into two products, CaO and CO₂

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.