This chapter is currently out of syllabus
1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.
A
Fe2O3(s) + 3CO(g) $$ \to $$ 2Fe(l) + 3CO2(g)
B
CaCO3(s) $$ \to $$ CaO(s) + CO2(g)
C
CaO(s) + SiO2(s) $$ \to $$ CaSiO3(s)
D
2C(s) + O2(g) $$ \to $$ 2CO(g)
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following elements is present as the impurity to the maximum extent in the pig iron?
A
Manganese
B
Carbon
C
Silicon
D
Phosphorus
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following pairs of metals is purified by van-Arkel method?
A
Ga and In
B
Zr and Ti
C
Ag and Au
D
Ni and Fe
4
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.
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