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  • Question 1
    4 / -1

    Which of the following are isoelectronic and isostructural?

  • Question 2
    4 / -1

    Which of the following element is most electropositive?

  • Question 3
    4 / -1

    One mole of magnesium in the vapour state absorbed 1200 kJ of energy. If the first and second ionization enthalpies of magnesium are 750 and 1450 kJ mol-1 respectively, the final composition of the mixture is

  • Question 4
    4 / -1

    The van der waals’ radii of O, N, Cl, F and Ne increase in the order

  • Question 5
    4 / -1

    The IUPAC name of the element with atomic number Z = 109 is

  • Question 6
    4 / -1

    In which of the following pairs both the species have nearly the same size?

  • Question 7
    4 / -1

    If the ionic radii of K+ and F- are nearly the same (i.e. 1.340Å), then the atomic radii of K and F respectively are

  • Question 8
    4 / -1

    P4 has exceptional outer electronic configuration as 4d105so. It belongs to

  • Question 9
    4 / -1

    Ionization enthalpy of an ion is equal to

  • Question 10
    4 / -1

    The correct values of ionization enthalpies (in kJ mol-1) of Si, P, Cl and S respectively are:

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