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Standard XII

Chemistry

Periodicity

Heavier eleme...

Question

Heavier elements of p-block do show higher order oxidation state because of :

lanthanide contraction

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inert pair effect

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screening effect

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absence of vacant d-orbital

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Solution

The correct option is A inert pair effect
Heavier element of p-block does show higher oxidation state because of the inert pair effect.

The inert pair effect is the tendency of the electrons in the outermost atomic s orbital to remain unionized or unshared in compounds of post-transition metals.

The term inert pair effect is often used in relation to the increasing stability of oxidation states that are two less than the group valency for the heavier elements of groups 13, 14, 15 and 16.

Hence the correct option is B.

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Similar questions

Read the following and select one the correct answer.

Statement I: $P b^{4 +}$ compounds are stronger oxidizing agents than $S n^{2 +}$ compounds

Statement II: The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to inert pair effect.

Q. Select the correct option for the below statements:
Statement I:

P b^{4 +}

compounds are stronger oxidizing agents than

S n^{4 +}

compounds.
Statement II: The higher oxidation states for the group

14

elements are more stable for the heavier members of the group due to the ‘inert pair effect’.

Q. Statement I

P b^{4 +}

compounds are stronger oxidising agents than

S n^{4 +}

compounds.
Statement II The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'.(J2008,3M)

Q. (i) Why do transition elements show variable oxidation states?
(ii) Name the element showing maximum number of oxidation states among the first series of transition metals from

S c (Z = 21)

Z n (Z = 30)

.
(iii) Name the element which shows only

+ 3

oxidation state.
(iv) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.

Q. Assertion :

C r (V I)

in the form of dichromate in acidic medium is a strong oxidising agent where

M o O_{3}

and

W O_{3}

are not. Reason: In d-block elements higher oxidation states are favoured by heavier members.

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