An example of a physical change is a) cooking an egg. b) folding paper into a frog. c) rusting iron in an old bicycle. d) reacting baking soda and vinegar to make a volcano.

the answer is b

yes definetly because you are using energy

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.