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Why the element of second period shows a...

Why the element of second period shows a number of difference in properties from other members of their respective families?

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The differences in the properties of the first member of a group from those of the other members are due to (i) the smaller size of the atom. (ii) high ionizaton enthalpy. (iii) abence of d-orbitals.
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Knowledge Check

  • Oxygen differs from other member of irts family due to

    A
    its small atomic size
    B
    its high electronegativity
    C
    absence of d-orbitals
    D
    All of these

  • Both boron and aluminium show difference in properties from the remaining members of group 13. This because

    A
    Both B and Al have smaller size as compared to others members of the family.
    B
    Both B and Al have high value of ionization energy
    C
    Both B and Al have only the valence eletrons `(ns2 np1)` outside the noble gas core while the reamaining elements have filled d and `f-orbitals` in between the noble gases and the valance electrons
    D
    None of the above.

  • The first element of the group 1 and 2 are different from other members of the respective group.Their behaviour is more similar to the second element of the following groups,What is this relationship known as ?

    A
    Anomalous relationship
    B
    Periodic relationship
    C
    Diagonal relationship
    D
    Chemical relationship
    • PRADEEP-P-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS
    1. Why the element of second period shows a number of difference in prope...

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    2. INERT PAIR EFFECT

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    3. Why is Bi(V) a stronger oxidant than Sb(V) ? Or of Bi (V) and Sb(V) ...

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    4. Give reasons for the least reactivity of nitrogen molecule.

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    5. Nitrogen is much less reactive than phosphorus. Explain. Or Phosphor...

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    6. Arrange the following in order of increasing base strength. NH(3), P...

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    7. Which is least acidic ? SbH(3), PH(3), NH(3), AsH(3)

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    8. Which is least basic ? SbH(3), PH(3), NH(3), AsH(3) ?

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    9. Which is a stronger reducing agent , SbH(3) of BiH(3) , and why ?

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    10. Why BiH3 is strongest reducing agent amongst group 15 hydrides ?

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    11. Which of the following is/are not known ? PCl(3), AsCl(3), SbCl(3), NC...

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    12. Which of the following is more covalent : SbCl(5) or SbCl(3) ?

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    13. Write balanced equation when NH(3) is dissolved in water.

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    14. ON adding NaOH to ammonium sulphate, a colourless gas with pungent odo...

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    15. Write chemical equation for thermal decomposition of ammonium dichroma...

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    16. How is nitrogen prepared from ammonia ?

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    17. What is laughing gas ? How is it prepared ?

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    18. What happens when a mixture of ammonium sulphate and sodium nitrate is...

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    19. Pb(NO(3))(2) on heating gives a brown gas which undergoes dimerization...

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    20. What is fuming nitric acid ? What colour is it ?

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