What defines a mixture?
a. a mixture cannot be broken down into simpler substances.
b. a mixture can be broken down into its basic substances through physical means.
c. a mixture is created through a chemical reaction.
d. a mixture can be described by a chemical formula.?

b.a mixture can be broken down into its basic substances through physical means.

Explanation:

The substances in a mixture can be separated using physical methods such as filtration, freezing, and distillation. There is little or no energy change when a mixture forms. Mixtures have variable compositions, while compounds have a fixed, definite formula.

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.