EASY
12th West Bengal Board
IMPORTANT
Earn 100
State briefly the principles which serve as the basis for the following operations in metallurgy :-Refining by Liquation.
Important Questions on General Principles and Processes of Isolation of Elements
EASY
12th West Bengal Board
IMPORTANT
Write the chemical reactions which take place in the following operations : electrolytic reduction of
MEDIUM
12th West Bengal Board
IMPORTANT
Write the chemical reactions which take place in the following operations :- Isolation of zinc from zinc blende.
MEDIUM
12th West Bengal Board
IMPORTANT
Write the chemical reactions which take place in the following operations-Mond's Process of refining Nickel.
MEDIUM
12th West Bengal Board
IMPORTANT
What chemical principle is involved in choosing a reducing agent for getting the metal from its oxide ore? Consider the metal oxide, alumina ferric oxide and justify the choice for the reducing agent ?
MEDIUM
12th West Bengal Board
IMPORTANT
Explain the role of
(i) cryolite in the electrolytic reduction of alumina
EASY
12th West Bengal Board
IMPORTANT
Explain the role of Carbon monoxide in the purification of nickel.
EASY
12th West Bengal Board
IMPORTANT
Describe the underlying principle of each of the following metal refining methods-
(i) Electrolytic refining of metals
EASY
12th West Bengal Board
IMPORTANT
Describe the underlying principle of each of the following metal refining methods-
(ii) Vapour Phase refining of metals
