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1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Which of the following oxides is amphoteric in character?
A
CaO
B
CO2
C
SiO2
D
SnO2
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
In which of the following arrangements the order is NOT according to the property indicated against it?
A
Li < Na < K < Rb Increasing metallic radius
B
I < Br < F < Cl Increasing electron gain enthalpy (with negative sign)
C
B < C < N < O Increasing first ionization enthalpy
D
Al3+ < Mg2+ < Na+ < F- Increasing ionic size
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Which one of the following ions has the highest value of ionic radius?
A
O2-
B
B3+
C
Li+
D
F-
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is
A
SO2 < P2O3 < SiO2 < Al2O3
B
Al2O3 < SiO2 < P2O3 < SO2
C
Al2O3 < SiO2 < SO2 < P2O3
D
SiO2 < SO2 < Al2O3 < P2O3
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