CBSE Class 12 Atoms Multiple Choice Questions with Answers. MCQ Questions Class 12 Atoms with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Atoms MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Atoms with Answers - Set - 3
Question 1:
For ionization of excited Hydrogen atom, the, required energy is:
(a) a little less than 13.6
(b) equal to 13.6
(c) more than 13.6
(d) 3.4 or less
Correct Answer – (D)
Question 2 :
The concept of electron spin was introduced by:
(a) Becquerel
(b) Goudsmit
(c) Millikan
(d) Uhlenbeek and Goudsmit
Correct Answer – (D)
Question 3 :
Isotones have the same:
(a) A
(b) Z
(c) N
(d) All the above
Correct Answer – (C)
Question 4 :
The mass of a neutron is:
(a) 1.00866 u
(b) 1.0866 u
(c) 1.866 u
(d) 0.1866 u
Correct Answer – (A)
Question 5 :
The energy equivalent to one atomic mass unit is :
(a) 1.6 × 10-19 J
(b) 6.02 × 1023 J
(c) 9.31 MeV
(d) 931 MeV
Correct Answer – (D)
MCQ Questions Class 12 Atoms with Answers
Question 6 :
The principle that a quantum orbital cannot be occupied by more than two electrons was given by:
(a) Pauli
(b) Millikan
(c) Hund
(d) None of these
Correct Answer – (A)
Question 7 :
Half-life of a substance depends on:
(a) pressure
(b) temperature
(c) density
(d) None of these
Correct Answer – (D)
Question 8 :
Isobars have the same:
(a) A
(b) Z
(c) N
(d) All the above
Correct Answer – (A)
Question 9 :
Who explained the splitting of special lines in magnetic field?
(a) Zeeman
(b) Bohr
(c) Summerfield
(d) Einstein
Correct Answer – (A)
Question 10 :
An atom stays in an excited state for about:
(a) 10 micro seconds
(b) 10 milli seconds
(c) 10 nano seconds
(d) 10 seconds
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
