Question

Which substance has the highest particle mobility?

water at 25 °C because liquid particles are the most mobile and mobility increases with decreasing temperature
steam at 105 °C because gas particles are the most mobile and mobility increases with increasing temperature
nitrogen gas at -200 °C because gas particles are the most mobile and mobility increases with decreasing temperature
ethyl alcohol at 30 °C because liquid particles are the most mobile and mobility increases with increasing temperature

Answer 1

I think its b

Answer 2

It's b. Gas is the form that molecules are most mobile in. The colder it gets, the closer it is to being water/ice.

Answer 3

I agree with b.