JEE Main 2013 (Offline) | d and f Block Elements Question 171 | Chemistry

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?

Mn (Z = 25)

Fe (Z = 26)

Co (Z = 27)

Cr (Z = 24)

AIEEE 2012

MCQ (Single Correct Answer)

-1

Iron exhibits + 2 and +3 oxidation states. Which of the following statements about iron is incorrect?

Ferrous oxide is more basic in nature than the ferric oxide

Ferrous compounds are relatively more ionic than the corresponding ferric compounds

Ferrous compounds are less volatile than the corresponding ferric compounds

Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds.

AIEEE 2011

MCQ (Single Correct Answer)

-1

The outer electron configuration of $$Gd$$ (Atomic No. $$64$$) is :

$$4{f^3}\,5{d^5}\,6{s^2}$$

$$4{f^8}\,5{d^0}\,6{s^2}$$

$$4{f^4}\,5{d^4}\,6{s^2}$$

$$4{f^7}\,5{d^1}\,6{s^2}$$

AIEEE 2011

MCQ (Single Correct Answer)

-1

In context of the lanthanoids, which of the following statements is not correct?

All the members exhibit +3 oxidation state

Because of similar properties the separation of lanthanoids is not easy.

Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series.

There is a gradual decrease in the radii of the members with increasing atomic number in the series.

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