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WB JEE

Metallurgy

Chemistry

Previous Years Questions

MCQ (More than One Correct Answer)

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During the preparation of NH3 in Haber's process, the promoter(s) used is/are -
WB JEE 2022

MCQ (Single Correct Answer)

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Extraction of a metal (M) from its sulphide ore (M2S) involves the following chemical reactions$$2{M_2}S + 3{O_2}\buildr...
WB JEE 2021
A copper coin was electroplated with Zn and then heated at high temperature until there is a change in colour. What will...
WB JEE 2019
In the Bayer's process, the leaching of alumina is done by using
WB JEE 2019

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