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A silver-white metal X taken in the form...

A silver-white metal X taken in the form of ribbon, when ignited, burns in air with a dizzling white flame to from a white powder Y. When is added to powder Y, it dissoves panrtially 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.

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