General Principles and Processes of Isolation of Elements - Online Test
Q1. In the extraction of nickel by Mond’s process, the metal is obtained by
Answer : Option A
Explaination / Solution:
Ni is first reacted with CO to form Nickel tetracarbonyl which is volatile. From this complex Nickel is extracted by thermal decomposition.
Q2. Blister copper is about
Answer : Option D
Explaination / Solution:
Blistter Cu is 98% Cu.
Q3. Refining of silver is done by
Answer : Option A
Explaination / Solution:
Ag is refined by Cupellation.
Q4. Which among the following is a method of concentration of ore?
Answer : Option C
Explaination / Solution:
Leaching is method of concentration of ore. In which ore is digested with particular solvent to form a soluble complex.
Q5. The slag obtained during the extraction of copper from copper pyrites is composed of
Answer : Option D
Explaination / Solution:
FeO is present as impurity and SiO2 is flux added.
Q6. Which of the following ore contains both Mg and Ca?
Answer : Option B
Explaination / Solution:
Dolomite is MgCO3 .CaCO3 .
Q7. Metal halides are found in lakes and seas because
Answer : Option A
Explaination / Solution:
Metal halides are soluble in water.
Q8. An ore has impurities which are lighter than the ore. The process used for the concentration of ore is
Answer : Option B
Explaination / Solution:
This is hydraulic washing or gravity separation. Here when stream of water is passed it takes away all the impurity with it
Q9. Leaching of gold is done by
Answer : Option A
Explaination / Solution:
Cyanide forms soluble complex with the gold.
Q10. The reducing agent used in the blast furnace to reduce haematite to iron is
Answer : Option A
Explaination / Solution:
CO is used as reducing agent.
