A silver-white metal X taken in the form of ribbon, when ignited, burns in air with a dazzling white flame to from a white powder Y. When is added to powder Y, it dissolves partially to from another substance Z.
(a) What could metal X be ?
(b) What is powder Y ?
(c ) With which substance metal X combines to from powder Y ?
(d) What is substance Z ? Name one domestic use of substance Z.
(e) Write a balanced chemical equation of the reaction which takes place when metal X burns in air to from powder Y.

Answer

(a) Magnesium, Mg (b) Magnesium oxide, MgO (c ) Oxygen (of air) ,`O_(2)` (d) Magnesium hydroxide, `Mg(OH)_(2);` used as antacid to relieve indigestion (e ) `2Mg+O_(2)to2MgO`