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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

1) When 3d orbital is complete, the new electron will enter the ⍟⍟⍟

A) 4p-orbital

B) 4s-orbital

C) 4d-orbital

D) 4f-orbital

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

2) Choose the value of the Rydberg constant among the following value? NUMS 2014

A) 1.7588 x 10¹¹

B) 1.602 x 10⁻¹⁹ C

C) 1.007 x 10⁷ m⁻¹

D) 1.09678 x 10⁷ m⁻¹

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

3) Which one has one unpaired electron in the valence shell? (ETEA – 2023)

A) Zn²⁺

B) Ti³⁺

C) Fe³⁺

D) Cu⁺

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

4) For a given value of quantum number l, the number of allowed values of m is given by ⍟⍟⍟

A) l+1

B) 2l+2

C) 2l+1

D) l+2

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

5) For the dumb-bell shaped orbital, the value of l is ⍟⍟⍟

A) 2

B) 1

C) 3

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

6) The maximum number of electrons that can be accommodated in the Mth shell is ⍟⍟⍟

A) 2

B) 32

C) 18

D) 8

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

7) The set of quantum numbers not applicable for an electron in an atom is ⍟⍟⍟

A) 2, 0, 0, +½

B) 1, 0, 0, +½

C) 1, 0, 0, -½

D) 1, 1, 1, +½

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

8) Particles involved in an ordinary chemical reaction are: ETEA 2009

A) Neutrons

B) Protons

C) Electrons

D) All of the above

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

9) The ratio of charge and mass would be greater for ⍟⍟⍟

A) Electron

B) Alpha

C) Proton

D) Neutron

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> x-rays

10) X-rays are widely used as a diagnostic tool in Medicine because of its: ETEA 2016

A) It is not electromagnetic waves

B) High penetrating power

C) Particle property

D) Cost of X-ray unit is low

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

11) Which electronic configuration for oxygen is correct according to Hund’s rule of multiplicity ⍟⍟⍟

A) 1s², 2s², 2Px³,2Py¹,2Pz⁰

B) 1s², 2s², 2Px²,2Py¹,2Pz¹

C) 1s², 2s², 2Px²,2Py²,2Pz⁰

D) None of these

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

12) The charge on the electron and proton is reduced to half. If the present value of Rydberg constant is R, then the new value of Rydberg constant will be: ETEA 2008

A) R/16

B) R/4

C) R/8

D) R/2

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

13) The number of orbitals in the fourth principal quantum number will be ⍟⍟⍟

A) 12

B) 8

C) 4

D) 16

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

14) Which of the following sets of quantum numbers represent an impossible arrangement? ⍟⍟⍟

A) 3, 2, -3, +½

B) 5, 3, 0, -½

C) 4, 0, 0, -½

D) 3, 2, -2, ½

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

15) Positive ions are formed from the neutral atom by the ⍟⍟⍟

A) Loss of electrons

B) Increase of nuclear charge

C) Gain of protons

D) Loss of protons

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

16) The relationship between quantum number n and I is: ETEA – 2020

A) n = 1-1

B) I = n-1

C) n= 1-2

D) I = n-2

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic number, Mass number, Atomic species

17) Which of the following are isoelectronic with one another? ⍟⍟⍟

A) Na⁺ and Ne

B) K⁺ and O

C) Na⁺ and K⁺

D) Ne and O

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

18) In a given atom no two electrons can have the same values for all the four quantum numbers. This is called ⍟⍟⍟

A) Aufbau’s principle

B) Uncertainty principle

C) Hund’s rule

D) Pauli’s exclusion principle

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

19) Quantum number values for “2p’ orbitals are: MDCAT 2020

A) n=2, 1=0

B) n=1, I=0

C) n=1, 1=2

D) n=2, 1=1

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

20) Be’s 4th electron will have four quantum numbers ⍟⍟⍟

A) 1, 1, 1, ½

B) 1, 0, 0, ½

C) 2, 1, 0, +½

D) 2, 0, 0, -½

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

21) The number of orientations of a sub-shell for which n=4 and 1=3 will be: ETEA – 2023

A) 3

B) 7

C) 1

D) 5

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

22) Electron occupies the available orbital singly before pairing in any one orbital occurs, it is ⍟⍟⍟

A) Pauli’s exclusion principle

B) Prout’s hypothesis

C) Heisenberg’s principle

D) Hund’s Rule

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

23) Chromium has the electronic configuration 4s¹3d⁵ rather than 4s²3d⁴ because ⍟⍟⍟

A) 4s has higher energy than 3d

B) 4s¹ is more stable than 4s²

C) 4s and 3d have the same energy

D) 4s¹3d⁵ (half-filled) is more stable than 4s²3d⁴

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

24) There are four orbitals s, p, d and f. Which order is correct with respect to the increasing energy of the orbitals? (MDCAT 2015)

A) 4s < 4f < 4p < 4d

B) 4s < 4p < 4d < 4f

C) 4p < 4s < 4f < 4d

D) 4f < 4s < 4d < 4p

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

25) Who postulated the following equation for energy emission when an electron drops from state n2 to n1? ETEA 2010

A) Einstein

B) Rutherford

C) Heisenberg

D) Bohr

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

26) 2p orbitals have ⍟⍟⍟

A) n=1, l=2

B) n=2, l=0

C) n=2, l=1

D) n=1, l=0

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

27) Which pair has 1 electron in its ‘s’ orbital? (ETEA – 2020)

A) Li & Fe

B) H & He

C) Na & Cr

D) K & Mn

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> SPECTRUM

28) The part of electromagnetic spectrum in which Lyman series lies is: ETEA 2012

A) Infrared region

B) Ultra violet region

C) Visible region

D) X-rays

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

29) Pauli’s exclusion principle states that ⍟⍟⍟

A) None of the above

B) Two electrons in the same atom can have the same energy

C) Two electrons in the same atom cannot have the same spin

D) The electrons tend to occupy different orbitals as far as possible

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

30) Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is ⍟⍟⍟

A) 5, 1, 1, +½

B) 6, 0, 0, +½

C) 2, 1, 0, +½

D) 5, 0, 0, +½

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

31) In any atom which sub-shell will have the highest energy in the following ⍟⍟⍟

A) 3d

B) 3s

C) 4s

D) 3p

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> SPECTRUM

32) Photon of which of the following series will have largest wave length ETEA – 2022

A) Balmer series

B) Paschen series

C) Bracket series

D) Pfund series

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> x-rays

33) For production of characteristic K, X-rays, the electron transition if from: ETEA 2018

A) n 3 to 2

B) n 2 to n-3

C) n 2 to no 1

D) n 1 to n-2

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

34) Which of the following orbital will be filled first than 4p? NUMS 2020

A) 3d

B) 4s

C) 1s

D) 2p

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

35) The number of orbitals in 2p sub-shell is ⍟⍟⍟

A) 2

B) 3

C) 4

D) 6

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

36) The number of orbital’s in ‘M’ shell of an atom is; ETEA 2010

A) 4

B) 5

C) 9

D) 1

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

37) The possible number of Orbitals in an orbit having principal quantum number 4 is KMU-CAT 2024

A) 32

B) 3

C) 14

D) 16

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

38) In Bohr’s model, atomic radius of the first orbit is γ, the radius of the 3rd orbit, is ⍟⍟⍟

A) 3γ

B) γ

C) 9γ

D) γ/3

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> SPECTRUM

39) Photon of the lowest wavelength is related to: ETEA – 2023

A) Bracket series

B) Pfund series

C) Balmer series

D) Paschen series

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

40) Which of the sub-shell is circular? ⍟⍟⍟

A) 4p

B) 4f

C) 4d

D) 4s

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

41) When an electron revolves in a stationary orbit then ⍟⍟⍟

A) It absorbs energy

B) It gains kinetic energy

C) It emits radiation

D) Its energy remains constant

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

42) Which orbital has lowest energy? (FMDC 2012)

A) 3p

B) 4s

C) 3d

D) 4f

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

43) The quantum number which specifies the location of an electron as well as energy is ⍟⍟⍟

A) Magnetic quantum number

B) Principal quantum number

C) Spin quantum number

D) Azimuthal quantum number

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

44) The total number of unpaired electrons in d-orbitals of atoms of element of atomic number 29 is ⍟⍟⍟

A) 5

B) 1

C) 10

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

45) Px orbital can accommodate ⍟⍟⍟

A) 2 electrons with opposite spins

B) 4 electrons

C) 6 electrons

D) 2 electrons with parallel spins

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

46) Which of the following has the lowest e/m ratio? ETEA – 2020

A) Li⁺²

B) He

C) H⁺¹

D) Be

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

47) The correct sequence of electronic configuration is: (ETEA – 2023)

A) 4p 4s 4d 5p 5s 5f6d

B) 4p 3s 4d 5p 6s 4f5d

C) 4p 4s 4d 5p 5s 4f5d

D) 4p 5s 4d 5p 6s 4f5d

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

48) The maximum number of electrons in electronic configuration can be calculated by using formula: (MDCAT 2016)

A) 2n² + 2

B) 2n²

C) 2l + 1

D) 2n² + 1

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

49) A sub-shell l = 2 can take how many electrons ⍟⍟⍟

A) 5

B) 6

C) 10

D) 3

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

50) _____________ states that no two electrons in an atom can have the same set of four quantum numbers (KMU-CAT 2023)

A) Hund’s law

B) Hinesburg’s uncertainly principle

C) Aufbau principle

D) Pauli exclusion principle

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> SPECTRUM

51) Which one of the following series are observed in the visible region of electromagnetic radiation. ETEA 2005

A) Pfunds series

B) Bracket series

C) Lyman series

D) Balmer series

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> x-rays

52) X-rays are defined as NUMS 2020

A) Electromagnetic radiations of high mass wavelength

B) Electromagnetic radiations of very high frequency

C) Electromagnetic radiations of high energy

D) Electromagnetic radiations of high mass number

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

53) Cathode rays are made up of ⍟⍟⍟

A) Positively charged particles

B) Neutral particles

C) None of these

D) Negatively charged particles

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

54) Bohr’s radius can have ⍟⍟⍟

A) +ve values

B) Discrete values

C) Fractional values

D) -ve values

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

55) The minimum real charge on any particle which can exist is ⍟⍟⍟

A) 4.8 × 10⁻¹⁰ Coulomb

B) 1.6 × 10⁻¹⁰ Coulomb

C) Zero

D) 1.6 × 10⁻¹⁹ Coulomb

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

56) The frequency of an electromagnetic radiation is 2×10⁶ Hz. What is its wavelength in metres (Velocity of light 3×10⁸ ms⁻¹) ⍟⍟⍟

A) 1.5×10²

B) 0.66×10⁻²

C) 6.0×10¹⁴

D) 1.5×10⁴

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

57) The amount of energy associated with quantum of radiation is directly proportional to NUMS 2020

A) wavelength

B) frequency

C) velocity

D) Photon

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

58) Which of the following statements does not form part of Bohr’s model of the hydrogen atom ⍟⍟⍟

A) The position and velocity of the electrons in the orbit cannot be determined simultaneously

B) Energy of the electrons in the orbit is quantized

C) The electron in the orbit nearest the nucleus has the lowest energy

D) Electrons revolve in different orbits around the nucleus

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

59) What is the radius of 3rd orbit of electron of H-atom ETEA – 2023**

A) 4.761 Å

B) 9.7 Å

C) 5.29 × 10⁻¹¹ Å

D) 3.39 Å

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

60) Which orbital is dumb-bell shaped? ⍟⍟⍟

A) d-orbital

B) s-orbital

C) f-orbital

D) p-orbital

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

61) The electronic configuration of an element with atomic number 7 i.e. nitrogen atom is ⍟⍟⍟

A) 1s², 2s¹, 2Px³

B) 1s², 2s², 2Px²,2Py¹

C) 1s², 2s², 2Px¹,2Py²

D) 1s², 2s², 2Px¹,2Py¹,2Pz¹

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

62) If maximum value of principle quantum number for an atom is four then total number of electrons in an atom will be KMU-CAT 2024

A) 3

B) 28

C) 60

D) 18

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

63) The four quantum numbers for the valence shell electron or last electron of sodium (Z=11) is ⍟⍟⍟

A) 3, 2, 2, ½

B) 3, 0, 0, ½

C) 2, [missing], -1, -½

D) 3, 2, -2, -½

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

64) The charge on one kg of electron is NUMS 2020

A) 1.65 × 10¹⁹C

B) 7.9 × 10²³C

C) 1.7588 × 10¹¹C

D) 9.1095 × 10³¹C

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

65) What is the magnetic quantum number for S-orbital? ETEA – 2023

A) 3

B) 5

C) 7

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

66) The energy of electron in the excited state n=4 in hydrogen atom is: ETEA 2010

A) -0.85eV

B) -13.6eV

C) -3.4eV

D) -1.5eV

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

67) Cathode rays are ⍟⍟⍟

A) Protons

B) Neutrons

C) α-particles

D) Electrons

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

68) The two electrons in K sub-shell will differ in ⍟⍟⍟

A) Azimuthal quantum number

B) Principal quantum number

C) Spin quantum number

D) Magnetic quantum number

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

69) The correct electronic configuration of Nickel (28) is: (ETEA 2012)

A) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s²

B) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s² 4p²

C) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s¹ 4p³

D) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷ 4s² 4p¹

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

70) What is the packet of energy called ⍟⍟⍟

A) Proton

B) Positron

C) Photon

D) Electron

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> SPECTRUM

71) Transition from n = 4,5,6…………….. to n = 3 in hydrogen spectrum gives ETEA 2007

A) Paschen series

B) Pfund series

C) Balmr series

D) Lyman series

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

72) Bohr model of an atom could not account for ⍟⍟⍟

A) Line spectrum of hydrogen

B) Emission spectrum

C) Absorption spectrum

D) Fine spectrum

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

73) The number of electrons which can be accommodated in an orbital is ⍟⍟⍟

A) Three

B) Four

C) Two

D) One

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electron, proton and neutron

74) Whether the cathode ray particles have positive or negative charge can be determined by KMU-CAT 2023

A) Passing them through oppositely charged plates

B) Passing them through a liquid

C) Passing them through air

D) Blocking them by an obstacle

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

75) If value of azimuthal quantum number l is 2, then total possible values of magnetic quantum number will be ⍟⍟⍟

A) 7

B) 3

C) 2

D) 5

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

76) For n = 3 energy level, the number of possible orbitals (all kinds) are ⍟⍟⍟

A) 4

B) 1

C) 9

D) 3

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Quantum numbers and shapes of orbitals

77) Principal, azimuthal and magnetic quantum numbers are respectively related to ⍟⍟⍟

A) Shape, size, orientation

B) Size, orientation, shape

C) Size, shape, orientation

D) None of the above

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> SPECTRUM

78) Which list shows electromagnetic waves in order of increasing frequency? ETEA 2018

A) Radio waves →gamma rays→ ultraviolet → infra-red

B) Radio waves→infrared →ultraviolet →gamma rays

C) Ultraviolet→gamma rays→radio waves→ infrared

D) Ultraviolet →infra-red→radio waves →gamma rays

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Electronic configuration

79) Electronic configuration of Gold [Au79] is (MDCAT 2015)

A) [Xe] 4f¹⁴, 5d⁹, 6s²

B) [Xe] 4f¹⁰, 5d¹⁰, 6s²

C) [Xe] 4f¹⁴, 5d¹⁰, 6s¹

D) [Xe] 4f¹⁴, 5d¹⁰, 6s²

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Category: BOMVirtual.com >> Chemistry >> 02 Atmoic Structure >> Atomic models and Planck’s quantum theory

80) The energy(eV) of an electron in nth orbit of hydrogen atom is ⍟⍟⍟

A) 13.6/n⁴

B) 13.6/n

C) 13.6/n²

D) 13.6/n³

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