Mock Test 1 — General Principles and Processes of Isolation of Metals (Metallurgy)

Ore of Hg:

Froth flotation is mainly for:

Aluminothermic process makes:

Reduction of $WO_3$ uses:

Bayer's process is for:

Anode mud of Cu electrolysis contains:

Cryolite is:

Mond process produces:

Zone refining for:

Pig iron contains carbon approximately:

Number of common metallurgical steps (concentration, reduction, refining... typical 4-5):

Oxidation state of Al in $Al_2O_3$:

Number of moles of electrons to deposit 1 mole of Al:

Assertion (A): Aluminium cannot be extracted by C reduction. Reason (R): In Ellingham diagram, $Al_2O_3$ line lies below CO line for all practical temperatures.

Assertion (A): Roasting converts sulfide ore to oxide; calcination converts carbonate to oxide. Reason (R): Roasting needs O₂ (excess); calcination doesn't.