JEE Questions for Chemistry Structure Of Atom Quiz 10 - MCQExams.com

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter–orbit jumps of the electron for Bohr orbits in an atom of hydrogen?
  • 5 → 2
  • 4 → 1
  • 2 → 5
  • 3 → 2
The value of the energy for the first excited state of hydrogen atom will be
  • –13.6 eV
  • –3.40 eV
  • –1.51 eV
  • –0.85 eV
In a hydrogen atom, if the energy of an electron in the ground state is 13.6 eV, then that in the 2nd excited state is
  • –1.51 eV
  • 3.4 eV
  • 6.04 eV
  • 13.6 eV
The wavelength associated with a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order

  • Chemistry-Structure of Atom-7945.png
  • 2)
    Chemistry-Structure of Atom-7946.png

  • Chemistry-Structure of Atom-7947.png

  • Chemistry-Structure of Atom-7948.png
The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately
  • 10–31 metres
  • 10–16 metres
  • 10–25 metres
  • 10–33 metres
The number of d-electrons in Fe2+ (Z =is not equal to that of the
  • p electrons in Ne (at. no. = 10)
  • s – electrons in Mg (at. no. = 12)
  • d – electrons in Fe
  • p – electrons in Cl − (at. no. of Cl = 17)
If n and l are respectively the principal and azimuthal quantum numbers, then the expression for the calculation of the total no. of electrons in any energy level is

  • Chemistry-Structure of Atom-7952.png
  • 2)
    Chemistry-Structure of Atom-7953.png

  • Chemistry-Structure of Atom-7954.png

  • Chemistry-Structure of Atom-7955.png
The number of photons of light having wave number x in 1J of energy source is (Planck’s constant = h, velocity of light = c)
  • hcx
  • hc/x

  • Chemistry-Structure of Atom-7957.png

  • Chemistry-Structure of Atom-7958.png
When atoms of the gold sheet are bombarded by a beam of α – particles, only a few α – particles get deflected whereas most of them go straight undeflected. This is because
  • The force of attraction on α – particles by the oppositely charged electron is not sufficient
  • The nucleus occupies much smaller volume as compared to the volume of atom
  • The force of repulsion on fast moving α – particles is very small
  • The neutrons in the nucleus do not have any effect on α – particles.
Which of the following statements is wrong? The probability of finding the electron in px orbital is
  • Maximum on two opposite sides of the nucleus along x – axis
  • zero at the nucleus
  • same on all the sides around the nucleus
  • zero on the z – axis
In uni electron system, the wave number of any spectral line is directly proportional to
  • the number particles present in the system
  • the velocity of electron undergoing transition

  • Chemistry-Structure of Atom-7960.png
  • the charge on the nucleus and the ë of light used.
Which of the following statements is/are correct?
  • Isotopes have same number of nucleons
  • Isobars have same number of protons
  • Isotones have same number of neutrons
  • Isobars are atoms of different elements with same isotopic number
According to Bohr’s Model of hydrogen atom
  • Total energy of the electron is quantized
  • Angular momentum of the electron is quantized and given as
    Chemistry-Structure of Atom-7961.png
  • Both (and (2)
  • None of the above
Mathematically, Heisenberg’s uncertainty principle can best be explained by

  • Chemistry-Structure of Atom-7962.png
  • 2)
    Chemistry-Structure of Atom-7963.png

  • Chemistry-Structure of Atom-7964.png

  • Chemistry-Structure of Atom-7965.png
In which of the following electron distributions in ground state, only the Hund’s rule is violated?

  • Chemistry-Structure of Atom-7966.png
  • 2)
    Chemistry-Structure of Atom-7967.png

  • Chemistry-Structure of Atom-7968.png

  • Chemistry-Structure of Atom-7969.png
Which of the following expressions imposes the condition of quantization of energy of an electron in an atom?

  • Chemistry-Structure of Atom-7970.png
  • 2)
    Chemistry-Structure of Atom-7971.png

  • Chemistry-Structure of Atom-7972.png

  • Chemistry-Structure of Atom-7973.png
The limiting line in Balmer series will have a frequency of

  • Chemistry-Structure of Atom-7974.png
  • 2)
    Chemistry-Structure of Atom-7975.png

  • Chemistry-Structure of Atom-7976.png

  • Chemistry-Structure of Atom-7977.png

Chemistry-Structure of Atom-7978.png
  • 328 kJ
  • 656 kJ
  • 984 kJ
  • 1312 kJ
In the atomic spectrum of hydrogen, the spectral lines pertaining to electronic transition of n = 4 to n = 2 refers to
  • Lyman lines
  • Balmer lines
  • Paschen lines
  • Brackett lines
When electronic transition occurs from higher energy state to a lower energy state with energy difference equal to ΔE electron volts, the wavelength of line emitted is approximately equal to

  • Chemistry-Structure of Atom-7979.png
  • 2)
    Chemistry-Structure of Atom-7980.png

  • Chemistry-Structure of Atom-7981.png

  • Chemistry-Structure of Atom-7982.png
The first line in the Balmer series in the H atom will have the frequency

  • Chemistry-Structure of Atom-7983.png
  • 2)
    Chemistry-Structure of Atom-7984.png

  • Chemistry-Structure of Atom-7985.png

  • Chemistry-Structure of Atom-7986.png
The orbital configuration of 24Cr is 3d54s1. The number of unpaired electrons in is
  • 3
  • 2
  • 1
  • 4
The maximum number of electrons in s, p and d – subshells are
  • 2 in each
  • 2, 4 and 6
  • 2, 6 and 10
  • 2, 6 and 12

Chemistry-Structure of Atom-7987.png
  • only (i) & (ii)
  • only (ii) & (iii)
  • only (ii) & (iv)
  • (ii), (iii) & (iv)

Chemistry-Structure of Atom-7988.png

  • Chemistry-Structure of Atom-7989.png
  • 2)
    Chemistry-Structure of Atom-7990.png

  • Chemistry-Structure of Atom-7991.png
  • none
A near U.V. photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength760 nm. Hence wavelength of the second photon is
  • 460 nm
  • 1060nm
  • 496nm
  • 300nm
A certain metal when irradiated to light ( = 3.2 × 1016 Hz) emits photoelectrons with twice kinetic energy as did photo electrons when the same metal is irradiated by light ( = 2.0 × 1016 Hz). The of metal

  • Chemistry-Structure of Atom-7993.png
  • 2)
    Chemistry-Structure of Atom-7994.png

  • Chemistry-Structure of Atom-7995.png

  • Chemistry-Structure of Atom-7996.png
The ratio of the radil of the first three Bohr orbit in H atom is

  • Chemistry-Structure of Atom-7997.png
  • 1 : 2 : 3
  • 1 : 4 : 9
  • 1 : 8 : 27
If threshold wavelength for ejection of electron from metal is 300nm, then work function for photoelectric emission is

  • Chemistry-Structure of Atom-7999.png
  • 2)
    Chemistry-Structure of Atom-8000.png

  • Chemistry-Structure of Atom-8001.png

  • Chemistry-Structure of Atom-8002.png
The mass of one mole of electron is

  • Chemistry-Structure of Atom-8004.png
  • 0.55mg

  • Chemistry-Structure of Atom-8005.png
  • 1.008mg
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Chemistry Quiz Questions and Answers