answersLogoWhite

0

'Which' is used when talking about one of a group of things known or implied by the speaker and listener. 'What' can refer to more unknown things, e.g.

1 Which is best, coke or lemonade?

2 What is lemonade?

While 'what' can be used in sentence 1 (what is best, coke or lemonade?) this use is more informal.

'Which' could only be used in sentence 2 if, for example, there were lots of cups on the table with different clear fluids inside, and the speaker wanted to know which one contains lemonade. This would have a very different meaning from 'what is lemonade?'

User Avatar

Wiki User

17y ago

What else can I help you with?