EASY
Earn 100

Explain the term Gangue?

Important Questions on General Principles and Processes of Isolation of Elements

HARD
Which among the following statement(s) is (are) true for the extraction of aluminium from bauxite?
EASY
Extraction of gold and silver involves leaching with CN- ion. Silver or gold is later recovered by:
EASY
The cyanide process of gold extraction involves leaching out gold from its ore with CN- in the presence of Q in water to form R . Subsequently, R is treated with T to obtain Au and Z . Choose the correct option(s).
HARD
Explain the purification of sulphide ore by froth floatation method.
EASY
Which one of the following ores is best concentrated by froth flotation method?
MEDIUM
Name the process by which impure ore of aluminium gets purified by using concentrated solution of an alkali.
MEDIUM
The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is
EASY

Al2O3 was leached with alkali to get X. The solution of X on passing of gas Y, forms Z.

X,Y and Z respectively are

EASY
Which of the following ore is concentrated using group 1 cyanide salt?
EASY
Sulphide ores are concentrated by froth floatation process only. Why?
EASY
The idea of froth flotation method came from a person X and this method is related to the process Y  of ores. X and Y,  respectivity, are:
EASY
Match items of column-I with the items of column-II and assign the correct code:
 
  Column I   Column II
(a) Cyanide process (i) Ultrapure Ge
(b) Froth floatation process (ii) Dressing of ZnS
(c) Electrolytic reduction (iii) Extraction of Al
(d) Zone refining (iv) Extraction of Au
    (v) Purification of Ni