In aromatization of n-hexane, the catalyst used is:
n - hexane and n - heptane, when passed through Cr2O3 supported over alumina at 6000 C respectively give
What is the catalyst used in the production of H₂SO₄ acid?
Which of the following are amphoteric oxides?
Mn2O7,CrO3,Cr2O3,CrO,V2O5,V2O4