Question

Thermal decomposition of sodium carbonate will produce:
Carbon dioxide II. Oxygen III. Sodium Hydroxide IV. No other product​

Answer 1

Sodium carbonate - Na2CO3, does not decompose in the presence of heat.  It is because of the fact that sodium metal is highly reactive in nature, hence forming a very strong bond with the carbonate atom.

∴ Answer is - (IV) No other product

Answer 2

Na2CO3======= Na2O  + CO2

                 Δ(HEAT)

WILL PRODUCE/EVOLVE=Carbon (iv)oxide/Carbondioxide(CO2)