Q.

The electronic configuration of four elements are (i) [Xe]6s2        (ii) [Xe]4f145d16s2    (iii) [Ar]3d104s24p5 (iv) [Ar]3d74s2 Which one of the following statements about these elements is not true

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a

(i) is a strong reducing agent

b

(ii) is a d block element

c

(iii) has high negative electron gain enthalpy

d

(iv) show variable oxidation states

answer is B.

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The electronic configuration of four elements are (i) [Xe]6s2        (ii) [Xe]4f145d16s2    (iii) [Ar]3d104s24p5 (iv) [Ar]3d74s2 Which one of the following statements about these elements is not true