MolSynapsequestion bank

MolSynapse / Question bank / Metallurgy / Extraction of Fe, Cu, Zn, Al, Ag, Au

JEE Main levelSingle correct optionDifficulty 2 of 3mt134

Which of the following changes is a calcination?

A $2 ZnS + 3 O X_{2} 2 ZnO + 2 SO X_{2}$
B $2 Cu X_{2} S + 3 O X_{2} 2 Cu X_{2} O + 2 SO X_{2}$
C $2 CuFeS X_{2} + O X_{2} Cu X_{2} S + 2 FeS + SO X_{2}$
D $ZnCO X_{3} ZnO + CO X_{2}$ on heating in limited air

Answer: D

Calcination is strong heating of an ore (usually carbonate or hydrated oxide) in the absence or limited supply of air, driving off

CO X_{2}

or water. The other three are roasting reactions in which oxygen is consumed.

Practice Metallurgy More on Extraction of Fe, Cu, Zn, Al, Ag, Au

Previous questionNext question

More questions on Extraction of Fe, Cu, Zn, Al, Ag, Au