1. In the Bohr’s model of the hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in a quantum state n is:

2. Which of the following statements does not form a part of Bohrs model of hydrogen atom?

3. The increasing order (lowest first) for the values of e/m (charge/mass) for

4. 3p orbital has _____ radial nodes

5. Which of the following element has least number of electrons in its M-shell?

6.  A gas X has C_p and C_v ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms

7. In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom

8. Which one of the following sets of ions represents a collection of isoelectronic species? (Atomic nos.: F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

9. A 0.66 kg ball is moving with a speed of 100 m/s. Find its wavelength

10. 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:

11. Number of unpaired electrons in N²⁺

12. A sub-shell with n = 6 , l = 2 can accommodate a maximum of

13. Which of the following statements does not form a part of Bohr’s model of hydrogen atom?

14. Which of the following sets of quantum numbers represents the highest energy of an atom?

15. The magnetic quantum number specifies

16. The excitation energy of a hydrogen atom from its ground state to its third excited state is

17. The orientation of atomic orbitals depends on their

18. Maximum number of electrons in a subshell can be

19. Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively:

20. Which of the following statements in relation to the hydrogen atom is correct?