State whether the following statement is true or false:
Iron does not burn on heating,but iron filings burn vigorously when sprinkled in the flame of a burner.

Give the steps involved in the extraction of metals of low and medium reactivity from their respective sulphide ores.

Which gas is highly soluble in water?

Which gas is used in the process of converting vegetable oils into vegetable ghee?

$A$ metal $E$ is stored under kerosene oil. When a small piece of it is left open in the air,it catches fire. When the product formed is dissolved in water,it turns red litmus blue.
$(i)$ Name the metal $E$.
$(ii)$ Write the chemical equations for the reaction when it is exposed to air and when the product is dissolved in water.
$(iii)$ Explain the process by which the metal is obtained from its molten chloride.

What is formed when sodium absorbs moisture from air? Give the chemical equation as well.