This chapter is currently out of syllabus
1
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :
A
liquation
B
vapour phase refining
C
distillation
D
zone refining
2
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The purest from of commercial iron is :
A
pig iron
B
wrought iron
C
cast iron
D
scrap iron and pig iron
3
JEE Main 2019 (Online) 12th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The correct statement is :
A
leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate
B
the Hall-Heroult process is used for the production of aluminium and iron
C
pig iron is obtained from cast iron
D
the blistered appearance of copper during the metallurgical process is due to the evolution of CO2
4
JEE Main 2019 (Online) 12th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are :
A
washer woman and concentration
B
fisher woman and concentration
C
wisher man and reduction
D
fisher man and reduction
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