1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of + 2 oxidation state will be there in which of the following order?
(At. nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
A
Mn > Fe > Cr > Co
B
Fe > Mn > Co > Cr
C
Co > Mn > Fe > Cr
D
Cr > Mn > Co > Fe
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of
A
Cr2(SO4)3
B
CrO$$_4^{2 - }$$
C
Cr2(SO3)3
D
CrSO4
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers ?
A
3
B
4
C
0
D
2
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The d-electron configurations of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour?
(At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
A
[Mn(H2O)6]2+
B
[Fe(H2O)6]2+
C
[Co(H2O)6]2+
D
[Cr(H2O)6]2+
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