Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 2 Structure of Atom with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Structure of Atom Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well.
Q.1 The number of nodal planes in px orbital is
(a) one
(b) two
(c) three
(d) zero
(a) one
Q.2 Azimuthal quantum number determines the
(a) size
(b) spin
(c) orientation
(d) angular momentum of orbitals
(d) angular momentum of orbitals
Q.3 The line spectrum of hydrogen obtained in the visible region of light corresponds to
(a) Lyman series
(b) Balmer series
(c) Paschen series
(d) Brackett series
(b) Balmer series
Q.4 A sub-shell with n = 6 , l = 2 can accommodate a maximum of
(a) 12 electrons
(b) 36 electrons
(c) 10 electrons
(d) 72 electrons
(c) 10 electrons
Q.5 Rutherford’s experiment which established the nuclear model of the atom used a beam of
(a) β-particles which impinged on a metal foil and got absorbed
(b) γ-rays, which impinged on a metal foil and got absorbed
(c) helium atoms which impinged on a metal foil and got reflected
(d) helium nuclei which impinged on a metal foil and got scattered
(d) helium nuclei which impinged on a metal foil and got scattered
Q.6 The quantum numbers + 1/2 and – 1/2 for the electron spin represent
(a) rotation of the electron in clockwise and anticlockwise direction respectively
(b) rotation of the electron in anticlockwise and clockwise direction respectively
(c) magnetic moment of the electron pointing up and down respectively
(d) two quantum mechanical spin states which have no classified analogue
(d) two quantum mechanical spin states which have no classified analogue
Q.7 In chromium atom, in ground state, the number of occupied orbitals is
(a) 14
(b) 15
(c) 7
(d) 12
(b) 15
Q.8 The energy of electron in the first Bohr orbit of H atom is 13.6 eV. The possible energy value (s) of the excited state(s) for electron in Bohr orbitals of hydrogen is (are)
(a) – 3.4 eV
(b) -4.2eV
(c) – 6.8 eV
(d) + 6.8 eV
(a) – 3.4 eV
Q.9 The last entering electron in an element has quantum number n = 3, l = 2, m = + 2 and s = + 1 /2. The atomic number of the element will be
(a) 13
(b) 21
(c) 29
(d) 39
(c) 29
Q.10 Bohr atomic model can explain
(a) the spectrum of hydrogen atom only
(b) spectrum of an atom or ion containing one electron only
(c) the spectrum of hydrogen molecule
(d) the solar spectrum
(b) spectrum of an atom or ion containing one electron only
Q.11 The magnetic quantum number specifies
(a) Size of orbitals
(b) Shape of orbitals
(c) Orientation of orbitals
(d) Nuclear Stability
(c) Orientation of orbitals
Q.12 The increasing order (lowest first) for the values of e/m (charge/mass) for
(a) e, p, n, α
(b) n, p, e, α
(c) n, p, α, e
(d) n, α, p, e
(d) n, α, p, e
Q.13 Maximum number of electrons in a subshell with l = 3 and n = 4 is
(a) 10
(b) 12
(c) 14
(d) 16
(c) 14
Q.14 A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:
(a) 518 nm
(b) 1035 nm
(c) 325 nm
(d) 743 nm
(d) 743 nm
Q.15 For principal quantum number n = 4, the total number of orbitals having l = 3 is
(a) 3
(b) 7
(c) 5
(d) 9
(b) 7
Q.16 Which of the following statements in relation to the hydrogen atom is correct?
(a) 3s orbital is lower in energy than 3p orbital
(b) 3p orbital is lower in energy than 3d orbital
(c) 3s and 3p orbitals are of lower energy than 3d orbital
(d) 3s, 3p and 3d orbitals all have the same energy
(d) 3s, 3p and 3d orbitals all have the same energy
Q.17 The magnetic quantum number specifies
(a) Size of orbitals
(b) Shape of orbitals
(c) Orientation of orbitals
(d) Nuclear Stability
(c) Orientation of orbitals
Q.18 Which of the following element has least number of electrons in its M-shell?
(a) K
(b) Mn
(c) Ni
(d) Sc
(a) K
Q.19 In the ground state, an element has 13 electrons in its M-shell. The element is _________.
(a) Copper
(b) Chromium
(c) Nickel
(d) Iron
(b) Chromium
Q.20 Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively:
(a) 12 and 4
(b) 12 and 5
(c) 16 and 4
(d) 16 and 5
(b) 12 and 5
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