Question

A silvery metal is in the form of a ribbon. When ignited
burns in air with a dazzling white flame to form a white
powder Y. When water is added to powder Y, it dissolves
partially to form another substance Z.
a) What are X, Y and Z?
b) With which substance metal X combine to form powder Y.
c) Write a balanced chemical equation of the reaction which takes
place when metal X burns in air to form powder Y.​

Answer 1

Answer:

(a) X=Magnesium (Mg) Ribbon, Y=Magnesium Oxide (MgO), Z=Magnesium Hydroxide [Mg(OH)2]

(b) Oxygen combines with X to form Y.

(c) 2 Mg + O2 ---> 2 MgO

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