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On heating Iron (ll)Oxalate in atmospheric air then reacting the result with conc. sulfuric acid on adding concentrated ammonia solution to the product ppt

On heating Iron (ll)Oxalate in atmospheric air then reacting the result with conc. sulfuric acid on adding concentrated ammonia solution to the product ………………… ppt will be formed and on heating it produces……………… and water.

a. Greenish white / Iron (ll) oxide

b. reddish brown / Iron (ll) oxide

c. reddish brown / Iron (lll) oxide

d. the product don’t react with ammonia

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