What are the limitations of litmus paper and phenolphthalein indicators? Name two other indicators that can be used that do not have such limitations

It is merely a rough indicator of acidity or basicity. Phenolphthalein on the other hand has the major limitation of having an uncertain end point. The indicators, methyl orange and bromophenol blue do not have such limitations.

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.