Oxidation of SO2 to SO3 is favoured by______________________?

A. Polyamide
B. Thermosetting resin
C. Polyester
D. None of these

A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene

A. Poorer tensile strength
B. Poorer resistance to oxidation
C. Greater amount of heat build-up under heavy loading
D. All A , B. and C.

A. Styrene
B. Phenol
C. Phthalic anhydride
D. None of these

A. Nickel
B. Vanadium
C. Silica gel
D. Alumina