General Principles and Processes of Isolation of Elements - Online Test
Q1. In extraction of gold and silver, the metals is leached into aqueous solution using
Answer : Option B
Explaination / Solution:
CN−forms complex with gold or silver.
Q2. Liquation method is used for the metals which have
Answer : Option D
Explaination / Solution:
Liquification is purification technique used for metals having low melting points.
Q3. Ultrapurification method is used for
Answer : Option A
Explaination / Solution:
Fact
Q4. Which metal is used in paints and lacquers?
Answer : Option C
Explaination / Solution:
Al is generally used in paints and lacquers.
Q5. Extraction process of Bauxite is known as
Answer : Option D
Explaination / Solution:
Hall – Heroult process of extraction of Al from Bauxite.
Q6. Which among the following ores are not found on earth’s crust?
Answer : Option C
Explaination / Solution:
Nitrides are not found in Earth crust.
Q7. Which metal ores occur in lakes and sea?
Answer : Option A
Explaination / Solution:
Halides ores occur in lakes and sea.
Q8. Cassiterite is the chief ore of
Answer : Option D
Explaination / Solution:
SnO2 is formula of casserite.
Q9. Cinnabar is an ore of
Answer : Option B
Explaination / Solution:
HgS is cinnabar.
Q10. The Wilfley table is used in the process of
Answer : Option A
Explaination / Solution:
Wilfley table is used in Hydraulic washing.
