1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Which of the following oxide is amphoteric?
A
SnO2
B
CaO
C
SiO2
D
CO2
2
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)
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?
A
$$O_2^ - ,O_2^{2 - }$$ - Both diamagnetic
B
$$O_2^ + ,{O_2}$$ - Both paramagnetic
C
O, $$O_{2}^{2-}$$ - Both paramagnetic
D
$${O^ + },O_2^{2 - }$$ - Both paramagnetic
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Which of the following carbonyls will have the strongest C–O bond ?
A
Cr (CO)6
B
Fe (CO)5
C
Mn (CO)6+
D
V(CO)6-
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