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1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The correct order of magnetic moments (spin only values in B.M.) among is :
(Atomic numbers: Mn = 25; Fe = 26, Co =27)
A
[MnCl4]2- > [CoCl4]-2 > [Fe(CN)6]-4
B
[Fe(CN)6]-4 > [CoCl4]2- > [MnCl4]2-
C
[Fe(CN)6]4- > [MnCl4]2- > [CoCl4]2-
D
[MnCl4]2- > [Fe(CN)6]4- > [CoCl4]2-
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN– ion towards metal species is :
A
c, a
B
b, c
C
a, b
D
a, b, c
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?
A
In acidic solutions protons coordinate with ammonia molecules forming $$NH^+_4$$ ions and NH3 molecules are not available
B
In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali
C
Copper hydroxide is an amphoteric substance
D
In acidic solutions hydration protects copper ions.
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
One mole of the complex compound Co(NH3)5Cl3, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO3 solution to yield two moles of AgCl (s). The structure of the complex is :
A
[Co(NH3)3Cl3]. 2NH3
B
[Co(NH3)4Cl2] Cl. NH3
C
[Co(NH3)4Cl] Cl2. NH3
D
[Co(NH3)5Cl] Cl2
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