MEDIUM
12th CBSE
IMPORTANT
Earn 100

Wrought iron is the purest form of iron. Write a reaction used for the preparation of wrought iron from cast iron. How can the impurities of sulphur, silicon and phosphorus be removed from cast iron?

Important Questions on General Principles and Processes of Isolation of Elements

MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 30
How is copper extracted from low grade copper ores?
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 31
Write two basic requirements for refining of a metal by Mond's process and by Van Arkel Method.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 32
Although carbon and hydrogen are better reducing agents but they are not used to reduce metallic oxides at high temperatures. Why? 
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 33
How do we separate two sulphide ores by froth floatation method? Explain with an example.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 34
The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving reaction.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 35
The mixture of compounds A and B is passed through a column of Al2O3 by using alcohol as an eluent. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?
EASY
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 37
Why are sulphide ores converted to oxide before reduction?
EASY
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 6 - General Principles and Processes of Isolation of Elements>Short Answer Type>Q 38
Which method is used for refining Zr and Ti? Explain with equation.