A physical change creates a new substance because bonds are broken or formed

Answer

A physical change could happen without changing any of the characteristics, here a example lets say if you have a ice cube that is frozen H2O and you let it sit it will melt only changing the physical appearance and the molecules in the substance. A physical change don't change the physical composition.

Explanation:

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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.