Technetium, the element below manganese in the Periodic Table, would be expected to have high values — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Solid ferrous sulfate heptahydrate first dehydrates to anhydrous FeSO4, which on further strong heating undergoes thermal decomposition. Step 2: The decomposition involves both oxidation of iron(II) and reduction/oxidation of sulfur: 2FeSO4 --Δ--> Fe2O3 + SO2 + SO3. Step 3: Therefore, the heating of ferrous sulfate yields a mixture of sulfur dioxide (SO2) and sulfur trioxide (SO3) gases, matching option (a).