1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Extraction of a metal (M) from its sulphide ore (M2S) involves the following chemical reactions
$$2{M_2}S + 3{O_2}\buildrel {Heat} \over \longrightarrow 2{M_2}O + 2S{O_2} \uparrow $$
$${M_2}S + 2{M_2}O\buildrel {Heat} \over \longrightarrow 6M + S{O_2} \uparrow $$
The metal (M) may be
$$2{M_2}S + 3{O_2}\buildrel {Heat} \over \longrightarrow 2{M_2}O + 2S{O_2} \uparrow $$
$${M_2}S + 2{M_2}O\buildrel {Heat} \over \longrightarrow 6M + S{O_2} \uparrow $$
The metal (M) may be
2
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
In the Bayer's process, the leaching of alumina is done by using
3
WB JEE 2019
MCQ (Single Correct Answer)
+2
-0.67
A copper coin was electroplated with Zn and then heated at high temperature until there is a change in colour. What will be the resulting colour?
Questions Asked from Metallurgy (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
WB JEE Subjects
Physics
Mechanics
Units & Measurements Vector Algebra Motion Laws of Motion Work Power & Energy Center of Mass Rotational Motion Properties of Matter Heat and Thermodynamics Simple Harmonic Motion Waves Gravitation
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Chemistry
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Some Basic Concepts of Chemistry Atomic Structure Redox Reaction Gaseous State Chemical Equilibrium Liquid Solution Ionic Equilibrium Thermodynamics Chemical Kinetics Radioactivity and Nuclear Chemistry Electrochemistry Solid State Surface Chemistry
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