It is possible to melt a piece of aluminium placed in a spoon made of zinc.

Explanation

The susceptibility of different base metals to corrosion while in contact, depends upon the difference between the contact potentials, or the electromotive voltage of the metals involved. The greater the potential difference is, the greater is the tendency for corrosion. the larger the separation distance in the electromotive chart between the two metals in contact, the higher the contact potential and chances for corrosion. for example, zinc and aluminium are very short distance apart in the cahrt, therefore potential for corrosion when these two metals are in contact is very low.
Therefore it is not possible to melt a piece of aluminium placed in a spoon made of zinc.