When a metal X is treated with cold water, it gives a base Y with molecular formula XOH and liberates a gas Z, which easily catches fire. Identify X and Z * (a) X = Zinc Z = Hydrogen gas (b) X = Calcium Z = Carbon dioxide gas (c) X = Sodium Z = Carbon dioxide gas (d) X = Sodium Z = Hydrogen gas
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The salt is NaOH and its molar mass can be calculated as follows:
Na(23)+O(16)+H(1)=23+16+1=40
It is clear that X is sodium, Y is sodium hydroxide and Z is hydrogen. The reaction can be shown by following equation: 2Na+2H2O→2NaOH+H2+Heat
Hydrogen is a highly inflammable gas and hence it easily catches fire.
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