Question

What will happen if an aluminum spoon is used to stir KNO3 solution

Answer 1

When ''Al" is in the contact with KNO3 the following reaction will occur...

Al + KNO3 = KAlO2 + Al2O3 + N2

So, when an aluminum spoon is used to stir KNO3 solution then N2 gas will evolved, KNO3 and Al2O3 produced