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MCQ for Full Syllabus Chemistry Structure of Atoms
Full Syllabus Chemistry students should refer to the following multiple-choice questions with answers for Structure of Atoms in Full Syllabus.
Structure of Atoms MCQ Questions Full Syllabus Chemistry with Answers
Question: The mass of a photon with a wavelength equal to 1.54 × 10–8 cm is
- a) 1.4285 × 10–32 kg
- b) 0.8268 × 10–34 kg
- c) None of these
- d) 1.2876 × 10–33 kg
Answer: 1.4285 × 10–32 kg
Question: If the Planck’s constant h = 6.6×10–34 Js, the de Broglie wavelength of a particle having momentum of 3.3 × 10–24 kg ms –1 will be
- a) 2Å
- b) 0.002 Å
- c) 0.5Å
- d) 500Å
Answer: 2Å
Question: The values of Planck's constant is 6.63 × 10–34 Js. The velocity of light is 3.0 × 108 m s–1. Which value is closest to the wavelength in nanometres of a quantum of light with frequency of 8 × 1015 s–1?
- a) 4 × 101
- b) 2 × 10–25
- c) 5 × 10–18
- d) 3 × 107
Answer: 4 × 101
Question: The de Broglie wavelength of a car of mass 1000 kg and velocity 36 km/hr is
- a) 6.626 × 10–38 m
- b) 6.626 × 10– 30 m
- c) 6.626 × l0–34 m
- d) 6.626 × 10–31 m
Answer: 6.626 × 10–38 m
Question: Heisenberg uncertainty principle can be explained as
- a)
- b)
- c)
- d)
Answer:
Question: Heisenberg's uncertainity principle is applicable to
- a) any moving object
- b) electron only
- c) atoms only
- d) nucleus only
Answer: any moving object
Question: The position of both, an electron and a helium atom is known within 1.0 nm. Further the momentum of the electron is known within 5.0 × 10–26 kg ms–1. The minimum uncertainty in the measurement of the momentum of the helium atom is
- a) 5.0 × 10–26 kg ms–1
- b) 80 kg ms–1
- c) 50 kg ms–1
- d) 8.0 × 10–26 kg ms–1
Answer: 5.0 × 10–26 kg ms–1
Question: Uncertainty in the position of an electron (mass = 9.1 × 10–31 kg) moving with a velocity 300 ms–1, accurate upto 0.001% will be (h = 6.63 × 10–34 Js)
- a) 1.92 × 10–2 m
- b) 3.84 × 10–2 m
- c) 5.76 × 10–2 m
- d) 19.2 × 10–2 m
Answer: 1.92 × 10–2 m
Question: The uncertainty in the position of an electron (mass = 9.1 × 10–28 g) moving with a velocity of 3.0 × 104 cm s–1 accurate upto 0.011% will be
- a) 0.175 cm
- b) 1.92 cm
- c) 7.68 cm
- d) 3.84 cm
Answer: 0.175 cm
Question: The Heisenberg uncertainity principle will be most significant for which of the following object ?
- a) Object B of mass 9.11 × 10–28 g
- b) Object A of mass 9.11 × 10–30 kg
- c) Object C of mass 9.11 × 10–24 mg
- d) Object D of mass 9.11 × 10–28 kg
Answer: Object B of mass 9.11 × 10–28 g
Question: The orientation of an atomic orbital is governed by
- a) Magnetic quantum number
- b) Principal quantum number
- c) Azimuthal quantum number
- d) Spin quantum number
Answer: Magnetic quantum number
Question: For which one of the following sets of four quantum numbers, an electron will have the heighest energy?
- a)
- b)
- c)
- d) None of these
Answer:
Question: Which of the following sets of quantum numbers is correct for an electron in 4f orbital ?
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d) None of these
Answer:
Question: Which of the following represents correct set of the four quantum numbers for an electron in a 4d subshell ?
- a) 4, 2, 1, – 1/2
- b) 4, 3, – 2, – 1/2
- c) 4, 2, 1, 0
- d) 4, 3, 2, + 1/2
Answer: 4, 2, 1, – 1/2
Question: The total number of electrons that can be accommodated in all orbitals having principal quantum number 2 and azimuthal quantum number 1 is
- a) 6
- b) 2
- c) 4
- d) 8
Answer: 6
Question:
- a) 14
- b) 6
- c) 0
- d) 2
Answer: 14
Question: Which of the following is not permissible arrangement of electrons in an atom?
- a)
- b)
- c)
- d)
Answer:
Question: Which of the following sets of quantum numbers represents the highest energy of an atom?
- a)
- b)
- c)
- d)
Answer:
Question: What will be the sum of all possible values of l and m for n = 5 ?
- a) 13
- b) 9
- c) 12
- d) 4
Answer: 13
Question: The following quantum numbers are possible for how many orbital(s) n = 3, l = 2, m = +2 ?
- a) 1
- b) 3
- c) 4
- d) 2
Answer: 1
Question: The orbitals are called degenerate when
- a) they have the same energy
- b) they have different wave functions but same energy
- c) they have the same wave functions but different energies
- d) they have the same wave functions
Answer: they have the same energy
Question: The number of spherical nodes in 3p orbitals are
- a) one
- b) three
- c) None of these
- d) two
Answer: one
Question: Which of the following graph correspond to one node
- a)
- b)
- c)
- d)
Answer:
Question: If there are five radial nodes, then what can be the correct representation of the orbital for n = 8.
- a) 8d
- b) 8p
- c) 8s
- d) 8f
Answer: 8d
Question: What can be the representation of the orbital having 3 angular nodes and n = 5.
- a) 5f
- b) 5s
- c) 5d
- d) 5p
Answer: 5f
Question: The number of orbitals present in the fifth shell will be
- a) 25
- b) 50
- c) 10
- d) 20
Answer: 25
Question: Arrange the orbital of same shell in the increasing order of shielding strength of the outer shell of electrons. s, f, d, p
- a) s > p > d > f
- b) s > p < d < f
- c) s < p < d < f
- d) s > p > d < f
Answer: s > p > d > f
Question: Which of the following is not correct for electronic distribution in the ground state ?
- a) All of the above
- b)
- c)
- d)
Answer: All of the above
Question: The electronic configuration of gadolinium (Atomic number 64) is
- a)
- b)
- c)
- d)
Answer:
Question: The order of filling of electrons in the orbitals of an atom will be
- a) 4s, 3d, 4p, 5s, 4d
- b) 3d, 4p, 4s, 4d, 5s
- c) 3d, 4s, 4p, 4d, 5s
- d) 5s, 4p, 3d, 4d, 5s
Answer: 4s, 3d, 4p, 5s, 4d
Question:
- a) 6
- b) 4
- c) 5
- d) 3
Answer: 6
Question:
- a) ground state
- b) anionic form
- c) excited state
- d) cationic form
Answer: ground state
Question: Number of unpaired electrons in N2+ is
- a) 1
- b) 2
- c) 0
- d) 3
Answer: 1
Question: An ion has 18 electrons in the outermost shell, it is
- a)
- b)
- c)
- d)
Answer:
Question: In a given atom no two electrons can have the same values for all the four quantum numbers. This is called
- a) Pauli’s exclusion principle
- b) Aufbau principle
- c) Hund’s Rule
- d) Uncertainty principle
Answer: Pauli’s exclusion principle
Question: The electronic configuration of Cu (atomic number 29) is
- a)
- b)
- c)
- d)
Answer:
Question: The orbital diagram in which the Aufbau principle is violated is
- a)
- b)
- c)
- d) None of these
Answer:
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MCQs for Structure of Atoms Chemistry Full Syllabus
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