Fill in the following blanks with suitable words:
(a). Magnesium liberates_____gas on reacting with hot boiling water.
(b). The white powder formed when magnesium ribbon burns in oxygen is of______
(c). Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.
(d). A metal having low melting point is_____ but a non-metal having very high melting point is_____
(e). Calcium is a ______reaactive metal than sodium.
