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
Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)
A
Cr2+
B
Co2+
C
Ni2+
D
Ti3+
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
Magnetic moment 2.83 BM is given by which of the following ions?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
A
Ti3+
B
Ni2+
C
Cr3+
D
Mn2+
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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