Starting raw material for the manufacture of alum is_________________?

A. Titanium dioxide
B. Ferrous sulphate
C. Lead chromates
D. Zinc sulphides

A. Quartz
B. Galena
C. Siderite
D. Chalcopyrite

A. Air
B. Natural gas
C. Coke oven gas
D. None of these

A. Glycerine
B. Salt petre
C. Nitro glycerine
D. Dynamite

A. Triglyceride
B. Fatty acids
C. Fatty alcohol
D. Mono esters

A. Bakelite
B. Neoprene
C. Teflon
D. Nylon-66