"When a metal reacts with hydrogen carbon dioxide gas is produced" statement is false.
What is a chemical equation?
A chemical reaction is a representation of symbols of the elements to indicate the amount of substance and moles of reactant and product.
Generally, metals do not react with hydrogen. But some metals like sodium, potassium, calcium and magnesium force the hydrogen atom to accept the electrons given by these elements and form salt-like ionic solid compounds called metal hydrides.
Learn more about chemical equations here:
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