Helium is generally preferred as carrier gas over nitrogen and hydrogen because
A. it is inert
B. it has a lower viscosity
C. it doubles up as a party gas for balloons and funny voices
D. all of above
Answer:D
Helium is generally preferred as carrier gas over nitrogen and hydrogen because
A. it is inert B. it has a lower viscosity C. it doubles up as a party gas for balloons and funny voices D. all of above