The element with the electronic configuration 1s2 2s22p63s23p63d1

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

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


Advertisement
Advertisement

255.

The element with the electronic configuration 1s2 2s22p63s23p63d104s1 is

  • Cu

  • Ca

  • Cr

  • Co


A.

Cu

As the element copper has atomic number= 29. So, electronic configuration
= 1s2 2s2 2p6 3s2 3p6 3d10 4s1=[Ar] 3d10 4s1


Advertisement
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


Advertisement
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+


Advertisement