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INERT PAIR EFFECT...

INERT PAIR EFFECT

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In the elements of 4th, 5th, and 6th period of the p-block elements which come after d-block elements, the electrons present in the intervening d- and f-orbitals do not shield the s-electron of the valence shell effecitively.
As a result, `ns^(2)`-electrons remains more tightly held by the nucleus and hence do not participate in bonding. This is called inert pair effect.
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Assertion (A) : Addition of an inert gas to the equilibrium mixture has no effect on the state of equilibrium at constant volume or at constant pressure. Reason (R ) : The addition of inert gas at constant volume will not alter the concentrations of the reactants as well as products of a reaction mixture.

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Which of the following occurs as a consequence of inert pair effect ? a) SnCl_(2) acts as a reducing agent b) SnCl_(4) acts as an oxidising agent c) SnO_(2) is amphoteric d) PbO_(2) is an oxidant e) CCl_(2) is unstable but PbCl_(2) is stable

Effect Of Inert Gas Addition

Knowledge Check

  • Assertion (A) : Addition of an inert gas to the equilibrium mixture has no effect on the state of equilibrium at constant volume or at constant pressure. Reason (R ) : The addition of inert gas at constant volume will not alter the concentrations of the reactants as well as products of a reaction mixture.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true but R is not a correct explanation of A.
    C
    A is true but R is false
    D
    A is false but R is true.

  • Directions : This contain Assertion and Reason type question, Each question has 4 choices (1),(2),(3) and (4), out of which only one correct. Assertion (A) On going down the group-13, inert pair effect decreases. Reason ( R ) On moving down the group, stability of compounds in higher oxidation state increases.

    A
    Both Assertion and Reason are correct and Reason is the correct
    B
    Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
    C
    Assertion is correct but Reason is incorrect
    D
    Both Assertion and Reason are incorrect

  • The heavier elements of groups 13 and 14 besides the group oxidation state exhibit another oxidation state which is two units lower than the group oxidation state and the stability of this lower oxidation state increases down the group. This concept which is commonly called inert pair effect has been used to explain many physical and chemical properties of the element of these groups. The oxides which is the strongest acid is

    A
    `Tl_(2)O_(3)`
    B
    `PbO_(2)`
    C
    `CO_(2)` is a greenhouse gas
    D
    `SnO_(2)`
    • PRADEEP-SOME p-BLOCK ELEMENTS-ADDITIONAL QUESTIONS (VERY SHORT ANSWER QUESTIONS) I. Group 13 Elements
    1. INERT PAIR EFFECT

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    2. Why the elements of second row (first short period) show a number of d...

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    3. Which element of group 13 forms the most stable +1 oxidation state.

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    4. Name the element of group 13 which forms only covalent compounds.

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    5. Why boron compounds such as BF(3) are called electron deficient compo...

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    6. Why boron trihalides act as Lewis acids ?

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    7. BCl(3) behaves as a Lewis acid Give reason.

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    8. How does electron deficient compound BF(3) achieve electron saturation...

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    9. Why do boron halides form addition compounds with amines ?

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    10. Why BF(3) forms as an adduct with ammonia ?

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    11. Which element of group 13 forms amphotric hydroxide ?

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    12. How does BF(3) act as a catalyst in industrial process?

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    13. Draw the structure of Al(2)Cl(6).

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    14. What is the correct strctural formula of borax (Na(2)B(4)O(7).10H(2)O)

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    15. What happens when : (i) Carbon dioxide is passed through an aqueous...

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    16. What happens when a borax solution is acidfied ? Write a balanced equa...

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    17. With the help of a balanced chemical equation show how B(OH)(3) behave...

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    18. What happens when boric acid is heated?

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    19. What are boranes?

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    20. How is diborane prepared ?

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