Oil ( will float - floats) ( on - in ) water.
I answered this question as follows : Oil floats on water.
The exam setter says : Oil will float / floats on/in water. He means that all options are OK.
What do you think of this question?
All options are indeed OK, but yours is the sentence I would normally expect a native speaker to use to express the idea.
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All options are indeed OK, but yours is the sentence I would normally expect a native speaker to use to express the idea.
Oil is lighter than water. That means it floats on the surface of the water.
Under turbulent conditions, it may emulsify, but eventually it will separate out and float to the top.