Which of the following are characteristics of gases?

Question

I. They have a variable shape.

II. They are compressible  

III. The have a constant volume

IV. They have a high viscosity 

 

I and II 

 

I, II, and III

 

I and IV

 

II and III

 

All of the above 

 

My answer would be all of the above but I'm unsure. 

Answer 1

It isnt all of the above because (a) they don’t have a constant volume and (b) they don’t have a high viscosity. So what’s left?  I and II