Name one metal which will fit each of the following description. Also write the equation of the reaction.
(a) A metal which floats on water, reacts with it and forms an alkali.
(b) A metal that displaces silver from silver nitrate solution.
(c) A metal which is used for galvanising iron.
(d) A metal that reacts with oxygen without burning.
(e) A metal that bums in oxygen with a bright light.
(a) Sodium
$2Na + 2H_2O \rightarrow 2NaOH + H_2$
(b) Copper
$Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag $
(c) Zinc
(d) Aluminium
(e) Magnesium
$2Mg +O_2 \xrightarrow {heat} 2MgO$
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