Which of the following is not a clue for a chemical change ? A)leaves of the tree changing color
B) rusting of iron
C) fermentation of milk
D) Melting of ice

well in order to answer this question you have to provide more information < 3

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

if you're asking what comes out, it's steam.