Which gas is produced when a base reacts with a metal?

Which of the following is a noble metal?

State whether the following statement is true or false:
Iron does not burn on heating,but iron filings burn vigorously when sprinkled in the flame of a burner.

Generally,when metals are treated with mineral acids,hydrogen gas is liberated,but when metals (except $Mn$ and $Mg$) are treated with $HNO_3$,hydrogen is not liberated. Why?

Write the chemical equations for the reactions of zinc granules with:
$(i)$ Sulphuric acid
$(ii)$ Hydrochloric acid
$(iii)$ Aluminium chloride
$(iv)$ Sodium hydroxide
$(v)$ Nitric acid

Which of the following oxides is neutral in nature?