Kirti kept a metal spoon in a glass jar filled with pickle for a few days. She observed there were holes in the spoon. What could be the reason?

Answer 1

acid

Answer 2

Metal reacts with acid present in pickle to form salt hence, metal gets dissolved.

Answer 3

Since the spoon is made of metal, it reacts with acid present in the pickle to form salt hence, the metal gets dissolved and holes are formed.
Metal + Acid = Salt.