Important Questions of Structure of Atom Chemistry | Zigya

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251.

The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?

  • Li2+ (n = 2)

  • Li2+ (n = 3)

  • Be3+ (n = 2)

  • He+ ( n = 2)


252.

Which of the following set of quantum numbers represents the highest energy of an atom?

  • n =3, l=2, m=1, s= +1/2

  • n=4, l=0, m=0, s= -1/2

  • n=3, l=0, m=4, s= +1/2

  • n=3, l=1, m=1, s=+1/2


253.

The number of radial nodes present in 3p orbital is

  • 0

  • 1

  • 2

  • 3


254.

The radiation with maximum frequency is

  • X-ray

  • radio waves

  • UV rays

  • IR rays


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255.

The element with the electronic configuration 1s2 2s22p63s23p63d104s1 is

  • Cu

  • Ca

  • Cr

  • Co


256.

Which of the following electron has minimum energy?

  • n = 4; l = 0; m= 0; s = +12

  • n= 4; l= 1; m = ±1; s = +12

  • n = 5; l = 0; m = 0; s = +12

  • n = 3; l = 2; m = -2; s = +12


257.

How many emission spectral lines are possible when hydrogen atom is excited to nth energy level?

  • n(n+1)2

  • (n+1)2

  • (n-1)n2

  • n24


258.

Which of the following corresponds to the energy of the possible excited state of hydrogen?

  • -13.6 eV

  • 13.6 eV

  • -3.4 eV

  • 3.4 eV


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259.

The quantum number of four electrons are given below:
I. n = 4 l = 2 ml = -2 ms = -12
II. n = 3 l = 2 ml = 1 ms = +12
III. n = 4 l = 1 ml = 0 ms = +12
IV. n = 3 l = 1 ml = 1 ms = -12

The correct order of these increasing energies will be:

  • IV > III > II > I

  • I > II > III > IV

  • I > III > II > IV

  • IV > II > III > I


260.

The correct order of the spin only magnetic moment of metal ions in the following low spin complexes, [V(CN)6]4-, [Fe(CN)6]4-, [Ru(NH3)6]3+ and [Cr(NH3)6]2+ is

  • V2+  > Cr2+ > Ru3+ > Fe2+

  • V2+ > Ru3+ > Cr2+ > Fe2+

  • Cr2+ > V2+ > Ru3+ > Fe2+

  • Cr2+ > Ru3+ > Fe2+ > V2+


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