JEE Main 2019 — S Block Elements Question with Solution
From: JEE Main 2019 (Online) 11th January Evening Slot
Question
The reaction that does NOT define calcination is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A2Cu2S + 3O2 2Cu2O + 2SO2
Step-by-step explanation
Calcination involves heating of the ore in absence of
air.
2Cu2S + 3O2 2Cu2O + 2SO2
This reaction involve roasting. Roasting is carried out mainly for sulphide ores in presence of excess of oxygen.
2Cu2S + 3O2 2Cu2O + 2SO2
This reaction involve roasting. Roasting is carried out mainly for sulphide ores in presence of excess of oxygen.
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This is a previous-year question from JEE Main 2019, covering the S Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.