(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 ________ reactive metal than sodium.
(a) Hydrogen gas is liberated when magnesium react with hot boiling water.
(b) When magnesium ribbon burns in oxygen is of magnesium oxide, the white powder is formed.
(c) Ordinary aluminium strips are not attacked by water because of the presence of a layer of aluminium oxide on the surface of aluminium.
(d) A metal having low melting point is Sodium but a non-metal having very high melting point is Dimond.
(e) Calcium is a less reactive metal than sodium.