1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers)
A
Zr(40) and Hf(72)
B
Zr(40) and Ta(73)
C
Ti(22) and Zr(40)
D
Zr(40) and Nb(41)
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following processes does not involve oxidation of iron?
A
Formation of Fe(CO)5 from Fe.
B
Liberation of H2 from steam by iron at high temperature.
C
Rusting of iron sheets.
D
Decolourisation of blue CuSO4 solution by iron.
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives
A
Mn4+ and O2
B
Mn2+ and O2
C
Mn2+ and O3
D
Mn4+ and MnO2
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
Reason of lanthanoid contraction is
A
negligible screening effect of 'f'- orbitals
B
increasing nuclear charge
C
decreasing nuclear charge
D
decreasing screening effect.
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