This chapter is currently out of syllabus
1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
A
The $$\Delta $$G$$_f^o$$ of the sulphide is greater than those for CS2 and H2S.
B
The $$\Delta $$G$$_f^o$$ is negative for roasting of sulphide ore to oxide.
C
Roasting of the sulphide to the oxide is thermodynamically feasible.
D
Carbon and hydrogen are suitable reducing agents for metal sulphides.
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?
A
Galena
B
Copper pyrite
C
Sphalerite
D
Argentite
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The method of zone refining of metals is based on the principle of
A
greater mobility of the pure metal than that of the impurity
B
higher melting point of the impurity than that of the pure metal
C
greater noble character of the solid metal than that of the impurity
D
greater solubility of the impurity in the molten state than in the solid
NEET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12