Roasting of metallurgical ores is done mainly to ___________________?

Related Mcqs:

Extraction of _________________ employs an electrolytic process ?

A. Aluminium B. Silver C. Copper D. All A, B. and C...

Fatty material used in soap making is _______________________?

A. Fatty acid B. Fatty alcohols C. Tallow D. Detergents...

Prussian blue is chemically represented by__________________?

A. FeO.TiO2 B. Ca SO4 . 2H2O C. Fe4 [Fe (CN6)3] D. AlF3 . 3NaF...

Function of thinner in a paint is to ______________________ ?

A. Accelerate the oxidation of oil B. Prevent gelling of the paint C. Suspend pigments & dissolve film forming materials D. Form a protective film...

Which of the following fuel gases contains maximum amount of carbon monoxide ?

A. Coke oven gas B. Water gas C. Blast furnace gas D. L.D. converter gas...