What do you think is the difference between the "developing countries" classification and the "least developed countries" classification?

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.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

wher is the rest of the question