MCQ on Class 12 Physics Chapter 12 Atoms with Answers

We have compiled the MCQ Questions for Class 12 Chemistry Chapter 12 Atoms with Answers Pdf free download covering the entire syllabus for JEE/NEET and Boards. Practice MCQ Questions for Class 12 Physics with Answers on a daily basis and score well in exams. Refer to the Atoms Class 12 MCQs Quiz Questions with Answers here along with a detailed explanation

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Atoms Class 12 MCQs Questions with Answers

MCQ Questions for Class 12 Physics Chapter 12 Atoms with Answers

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1.  The Balmer series for the H-atom can be observed

 
 
 
 

2. On moving up in the energy states of a H-like atom, the energy difference between two consecutive energy states

 
 
 
 

3. The ratio between Bohr radii is

 
 
 
 

4.  For ionising an excited hydrogen atom, the energy required (in eV) will be

 
 
 
 

5.  In which of the following series, does the 121.5 nm line of the spectrum of the hydrogen atom lie ?

 
 
 
 

6. The first spectral series was discovered by

 
 
 
 

7. When an atomic gas or vapour is excited at low pressure, by passing an electric current through it then

 
 
 
 

8.  In a Rutherford scattering experiment when a projectile of
charge Z1 and mass M1 approaches a target nucleus of
charge Z2 and mass M2, the distance of closest approach
is r0. The energy of the projectile is

 
 
 
 

9. In the ground state in …A… electrons are in stable equilibrium while in …B… electrons always experiences a net force. Here, A and B refer to

 
 
 
 

10.  The spectral lines in the Brackett series arise due to transition of electron in hydrogen atom from higher orbits to the orbit with

 
 
 
 

11. The Bohr model of atoms

 
 
 
 

12. For a given value of n, the number of electrons in an orbit is

 
 
 
 

13. According to Bohr’s model of hydrogen atom

 
 
 
 

14. Which of the following in a hydrogen atom is independent of the principal quantum number n? (The symbols have their usual meanings).

 
 
 
 

15.  In Bohr’s model of an atom which of the following is an integral multiple of h/2π?

 
 
 
 

16. The hydrogen atom can give spectral lines in the Lyman, Balmer and Paschen series. Which of the following statement is correct?

 
 
 
 

17. For the ground state, the electron in the H-atom has an angular momentum = h, according to the simple Bohr model. Angular momentum is a vector and hence there will be infinitely many orbits with the vector pointing in all possible directions. In actuality, this is not true,

 
 
 
 

18. The first model of atom in 1898 was proposed by

 
 
 
 

19. An ionised H-molecule consists of an electron and two protons. The protons are separated by a small distance of the order of angstrom. In the ground state,

 
 
 
 

20. The angular momentum of electrons in an atom produces

 
 
 
 

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