CBSE Class 11 Chemistry Chapter 2 Structure of Atom Multiple Choice Questions with Answers. MCQ Questions Class 11 Chemistry Structure of Atom with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Chemistry Structure of Atom MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Chemistry Structure of Atom with Answers - Set - 4
Question 1:
Isoelectronic species are
(a) CO, CN–, NO+, C2 2–
(b) CO–, CN, NO, C2 –
(c) CO+, CN+, NO–, C2
(d) CO, CN, NO, C2
Correct Answer – (A)
Question 2 :
Which of the following set of quantum numbers belong to highest energy?
(a) n = 4, l = 0, m = 0, s = + ½
(b) n = 3, l = 0, m = 0, s = + ½
(c) n = 2, l = 1, m = 1, s = + ½
(d) n = 3, l = 2, m = 1, s = + ½
Correct Answer – (D)
Question 3 :
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
Correct Answer – (B)
Question 4 :
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
Correct Answer – (C)
Question 5 :
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
Correct Answer – (D)
MCQ Questions Class 11 Chemistry Structure of Atom with Answers
Question 6 :
Be2+ is isoelectronic with which of the following ions?
(a) H+
(b) Li+
(c) Na+
(d) Mg2+
Correct Answer – (B)
Question 7 :
Magnetic quantum number specifies
(a) orbital size
(b) orbital shape
(c) orbital orientation
(d) nuclear stability
Correct Answer – (C)
Question 8 :
What is the wavelength of light. Given energy = 2.91 × 10-19], h = 6.36 × 10-34 Js, c = 3.0 × 108 m/s?
(a) 6.56 nm
(b) 656 nm
(c) 0.656 nm
(d) 65.6 nm
Correct Answer – (B)
Question 9 :
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
Correct Answer – (A)
Question 10 :
If the nitrogen atom had electronic configuration 1s², it would have energy lower than that of the normal ground state configuration 1s² 2s² 2p³, because the electrons would be closer to the nucleus. Yet, 1s² is not observed because it isolates.
(a) Heisenberg’s Uncertainty Principle
(b) Hund’s rule
(c) Pauli Exclusion Principle
(d) Bohr postulate of stationary orbits
Correct Answer – (C)
- NCERT Solutions Class 11 Chemistry Chapter 1 : Some Basic Concepts of Chemistry
- NCERT Solutions Class 11 Chemistry Chapter 2 : Structure Of The Atom
- NCERT Solutions Class 11 Chemistry Chapter 3 : Classification of Elements and Periodicity in Properties
- NCERT Solutions Class 11 Chemistry Chapter 4 : Chemical Bonding and Molecular Structure
- NCERT Solutions Class 11 Chemistry Chapter 5 : States of Matter
- NCERT Solutions Class 11 Chemistry Chapter 6 : Thermodynamics
- NCERT Solutions Class 11 Chemistry Chapter 7 : Equilibrium
- NCERT Solutions Class 11 Chemistry Chapter 8 : Redox Reactions
- NCERT Solutions Class 11 Chemistry Chapter 9 : Hydrogen
- NCERT Solutions Class 11 Chemistry Chapter 10 : The s-Block Elements
- NCERT Solutions Class 11 Chemistry Chapter 11 : The p-Block Elements
- NCERT Solutions Class 11 Chemistry Chapter 12 : Organic Chemistry: Some Basic Principles and Techniques
- NCERT Solutions Class 11 Chemistry Chapter 13 : Hydrocarbons
- NCERT Solutions Class 11 Chemistry Chapter 14 : Environmental Chemistry
