Quiz  /  Structure of Atom Class 11 MCQ Questions With Answers

  • 1. 
    Neutrons have a negative charge

  • True
  • False

  • 2. 
    A particle that moves around the nucleus is called an

  • proton
  • electron
  • neutron

  • 3. 
    Particles in an atom that are neutral and have no charge are

  • protons
  • neutrons
  • electrons

  • 4. 
    The central region of an atom where its neutrons and protons are is its

  • nucleus
  • core
  • electron cloud
  • centre

  • 5. 
    What are the three particles that make up the atom?

  • protons, neutrons and isotopes
  • protons, negatives and electrons
  • neutrons, isotopes and electrons
  • protons, neutrons and electrons

  • 6. 
    All matter is made of

  • energy
  • electrons
  • atoms
  • compounds

  • 7. 
    Electrons have this type of charge

  • negative
  • neutral (no charge)
  • positive

  • 8. 
    The correct electronic configuration of Cr (Z=24) is

  • [Ar] 3d 5 4s 1
  • [Ar] 3d 4 4s 2
  • [Ar] 3d 9 4s 2
  • [Ar] 3d 10 4s 1

  • 9. 
    Which of the following radiations has largest energy?

  • λ = 30 nm
  • λ = 300 pm
  • ν = 3 x 10-12 s-1
  • ν = 3 x 10-10 s-1

  • 10. 
    The energy of an electron in 3rd orbit of hydrogen atom is:

  • -1311.8 kJ/mol
  • -82.0 kJ/mol
  • -145.7 kJ/mol
  • -327.9 kJ/mol

  • 11. 
    The quantum of light is

  • photon
  • neutron
  • electron
  • proton

  • 12. 
    Which is the isotone of 32Ge76 (atomic numberXmass number)

  • 32Ge77
  • 34Ge78
  • 36Ge79
  • 32Ge78

  • 13. 
    Which of the following is isoelectronic with Ca2+

  • Fe3+
  • S2-
  • Mg2+
  • P

  • 14. 
    The spectral line in hydrogen spectrum obtained when the electron jumps from n=5 to n=2 energy level belongs to:

  • Lyman series
  • Balmer series
  • Paschen series
  • Pfund series

  • 15. 
    For principal quantum number n=4, the total number of orbitals having l=3 is

  • 3
  • 5
  • 7
  • 9

  • 16. 
    Which of the above is violation of Pauli’s exclusion principle ?

  • A
  • B
  • C
  • D

  • 17. 
    Which spectra is known as fingerprint spectra?

  • Continuous emission spectra
  • Line emission spectra
  • Absorption spectra
  • All of above

  • 18. 
    The sub-shell with n=6, l=2 can accomodate a maximum of

  • 10 electrons
  • 12 electrons
  • 36 electrons
  • 72 electrons

  • 19. 
    The radius of first orbit of hydrogen is 0.53 Å. The radius of second orbit would be

  • 1.06 Å
  • 0.26 Å
  • 0.53 Å
  • 2.12 Å

  • 20. 
    The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2 x 1014 s-1 is 6.63 x 10-20 J. The threshold frequency of the metal is

  • 2 x 10-14 s-1
  • 3 x 1014 s-1
  • 1 x 1014 s-1
  • 1 x 10-14 s-1

  • 21. 
    The correct set of four quantum numbers for the balance electron of rubidium atom(z=37) is

  • 5, 1, 1, +1/2
  • 6, 0, 0, +1/2
  • 5, 0, 0, +1/2
  • 5, 1, 0, -1/2

  • 22. 
    Which of the following has the maximum number of unpaired d-electrons?

  • Ni3+
  • Cu+
  • Zn2+
  • Fe2+

  • 23. 
    Uncertainity in the position of an electron (mass= 9.1 x 10-31 kg) moving with a velocity 300 m/s, accurate upto 0.001% will be

  • 5.76 x 10-2 m
  • 1.92 x 10-2 m
  • 3.84 x 10-2 m
  • 19.2 x 10-2 m

  • 24. 
    In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the

  • Wavelength of incident light
  • Frequency of incident light
  • Velocity of incident light
  • Atomic mass of the element
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