Question

What is the value of diffusivity for hydrogen?

(a) 0.210

(b) 0.310

(c) 0.410

(d) 0.510

I had been asked this question in an internship interview.

My question is based upon Diffusivity at 25 Degree Celsius and 1 atm Pressure in division Modes and Diffusion of Mass Transfer

Answer 1

Correct option is (c) 0.410

Best explanation: It is highly flammable and will burn in air at a very wide range of concentrations. It reacts with every oxidizing agent. Its unit is cm    ^2/s.