Question

give reasons
a] sodium and potassium are stored in kerosene.
b] carbon cannot reduce the oxides of sodium or magnesium.
c] nacl is conductor in aqueous state.
d] metals like sodium, potassium, calcium are never found in free state

Answer 1

A)When aluminium is dipped in nitric acid a layer of aluminium oxide is formed on the metal. This happens because nitric acid is a strong oxidizing agent. The layer of aluminium oxide prevents further reaction of aluminium. Due to this, the reactivity of aluminium decreases. B)Sodium and magnesium have higher affinity towards oxygen than towards carbon because these are highly reactive metals. Hence, carbon cannot reduce the oxides of Na or Mg. C)Ionic compounds do not conduct electricity in solid state but they conduct electricity in aqueous solution and in molten state. Hence, this property is shown by sodium chloride. D)Iron articles are galvanized to prevent rusting of iron. After galvanization, the layer of zinc works as protective layer. E)Metals; like Na, K, Ca and Mg are highly reactive metals and hence they are not found in their free state in nature. Plz mark it as best answer. Sorry yrr. It's is combined. Pls view it correctly and write

Answer 2

sodium and potassium reacts very fast with air so they are stored under kerosene