______________ is an ore concentrating metallurgical process involving a chemical change?

Related Mcqs:

Presence of carbonaceous matter in the sewage____________________?

A. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures B. Reduces sulphate ions to sulphides causing obnoxious smell C. Increases the quantity of chlorine used for its purification D. All A, B. and C....

Highly porous refractory bricks are ____________________?

A. Less susceptible to chemical attack by molten fluxes and gases etc B. Very strong C. Having very high thermal conductivity D. None of these...

Catalytic oxidation-dehydrogenation of methyl alcohol produces__________________?

A. Formaldehyde B. Phenol C. Acetone D. Maleic anhydride...

Adipic acid is an intermediate in the manufacture of________________?

A. Perspex B. Nylon-66 C. Polystyrene D. Bakelite...

Sulphuric acid is mainly used in the _______________ industry ?

A. Fertiliser B. Steel C. Paper D. Paint...