1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest $$E_{{M^{3 + }}/{M^{2 + }}}^0$$ value?
A
Mn (Z = 25)
B
Fe (Z = 26)
C
Co (Z = 27)
D
Cr (Z = 24)
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Iron exhibits + 2 and +3 oxidation states. Which of the following statements about iron is incorrect?
A
Ferrous oxide is more basic in nature than the ferric oxide
B
Ferrous compounds are relatively more ionic than the corresponding ferric compounds
C
Ferrous compounds are less volatile than the corresponding ferric compounds
D
Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds.
3
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
In context of the lanthanoids, which of the following statements is not correct?
A
All the members exhibit +3 oxidation state
B
Because of similar properties the separation of lanthanoids is not easy.
C
Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series.
D
There is a gradual decrease in the radii of the members with increasing atomic number in the series.
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
The outer electron configuration of $$Gd$$ (Atomic No. $$64$$) is :
A
$$4{f^3}\,5{d^5}\,6{s^2}$$
B
$$4{f^8}\,5{d^0}\,6{s^2}$$
C
$$4{f^4}\,5{d^4}\,6{s^2}$$
D
$$4{f^7}\,5{d^1}\,6{s^2}$$
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