When a wooden vessel is broken and then reformed from those pieces — does the new vessel inherit the original impurity?
Halacha 1: when wood, leather, or bone keilim are broken they are purified. New keilim made from them start pure — unlike metal keilim.
Question 2
Why did the Sages decree that metal vessels return to their former impurity after being melted and reformed?
Halacha 1: the Sages decreed this to avoid undue leniency — preventing people from destroying impure vessels to circumvent purification.
Question 3
A hatchet where the thick side is pure iron and the blade is impure iron — what is its status?
Halacha 5: when the thick side is pure iron and the blade from impure metal, it is impure — the blade (functional part) determines status.
Question 4
When glass vessels are melted and remade — do the new vessels inherit the original impurity?
Halacha 9: glass keilim that were melted down — new keilim made from them are pure. Unlike metal, there is no decree for glass to return to former impurity.
Question 5
A glass pane that can hold liquids — is it susceptible to impurity?
Halacha 16: when a glass item is used as a pane, it is pure even if it can contain liquids — because it was not made to serve as a container.