Atomic Structure, Atomic Structure, protons , nucleus , Atomic Models.
On Nokryan.com you will experience a fascinating journey through the Structure of atomic, where an intricate structure of matter has been revealed. Users are introduced to the composition and organization of atoms, starting with the basic concept of atomic structure. Transitioning seamlessly, the platform introduces the concept of protons, positively charged particles residing within the nucleus, Nokryan.com empowers learners to unravel the mysteries of atomic structure.
1. Bohr model of atom does not explain
- All of these
correct - Zeeman effect
- Origin of line in H₂ spectrum
- Stark effect
2. Each electron in an atom must have its own unique set of quantum numbers. This is a statement of:
- Aufbau principle
- Pauli exclusion principle
correct - Periodic law
- Hund’s rule
3. A proton is quite identical to
- Ionized hydrogen
correct - Ionized hydrogen molecule
- hydroponic ion
- α – Particle
4. Which are not electromagnetic radiations?
- Sound waves
correct - X – rays
- Radio waves
- Proton
5. The nature of positive rays depends upon
- All of the above
- The nature of electrode
- The nature of residual gas
correct - The nature of discharge tube
6. Ionization energies of the elements of group VA are greater than those of Group. VI A. The reason is that.
- Group V A elements have greater shielding effect
- Group VI A elements have greater shielding effect
- Group V A element have less electronegativity
- Group V A element half-filled atomic orbitals
correct
7. in the ground state of an atom, the electron is present
- Nearest to the nucleus
correct - In the nucleus
- In the second shell
- Farthest form the nucleus
8. Which orbital of the following has a principal quantum number of 3 and an angular momentum quantum number of 27?
- 3f
- 3s
- 3dcorrect
- 4f
9. The velocity of photon is:
- Depends on its source
- Independent of its wavelengthcorrect
- Depends on its wavelength
- Equal to square
10. The wave number of the light emitted by a certain source is 2 x 10⁶m . The wavelength of this light is:
- 200nm
- 500m
- 500nmcorrect
- 5 x 10⁷ m
11. The principle quantum number describes the
- Orientation from the orbital
- Shape of the orbital
- Distance from the nucleus
correct - Spin of the electron
12. Which of the following is not sub-atomic particle?
- Deuteron
correct - Neutron
- Electron
- Proton
13. How many orbitals are allowed for principle quantum number (n) of 3?
- 9correct
- 5
- 8
- 6
14. When cathode rays strike the anode metal, X-rays are emitted and not the positive rays. The reason is that cathode rays are
- Heated
- Knocked out electrons from anode that emit X-rays when outer electrons take their place
- Absorbed by the nucleuscorrect
- Material particles
15. Which of the following is not charged particle?
- Hydrogen
- Electron
- Proton
- Neutron
correct
16. Point out the orbitals which are degenerate in a multi electron atom
- 3d orbitalscorrect
- 3s, 3p, 3d orbitals
- 2d orbitals
- 1s, 2s orbitals
17. The mass of a neutron is times greater than the mass of electron
- 1840correct
- 1480
- 2000
- 540
18. Elements with _______ first ionization energies and _____ electron affinities generally form cations. Choose the correct point
- High, very negative
- Low very negative
- Low, positive or slightly negative
correct - High, positive or slightly negative
19. When 6d orbital is complete, the entering electron goes into
- 7s
- 7f
- 7p
correct - 7d
20. Millikan determined the charge on electron in oil drop experiment. It value is:
- 1.602 x 10¯²³ C
- 6.625 x 10¯³⁴ C
- 1.602 x 10²³ C
- 1.602 x 10¯¹⁹ C
correct
21. The mass of neutron is in the range of
- 1.6750 x 10¯²³ kg
- 1.6750 x 10¯²⁶ kg
- 1.6750 x 10¯²⁷kgcorrect
- 1.6750 x 10¯²² kg
22. Bohr’s model of atom is contradicted by:
- Quarternization of energy of electrons
- Heiesenberg’s uncertainity principle
correct - Planck’s quantum theory
- Quarternization of angular members
23. An oxygen atom has mass of
- 2.657 x 10¯²³g
correct - 5.316 x 10¯²³g
- 5.316 x 10²³g
- 16g
24. The atomic radii of elements lie in the order of
- 10¹² cm
- 10¯¹² cm
- 10⁸ cm
- 10¯⁸ cm
correct
25. Chlorine atom has set of n, l, m quantum number for the unpaired electrons:
- 3,1,1
correct - 3,0,0
- 2,1,1
- 2,1,0
Chemistry
- Basic Concepts
- Experimental Techniques
- Gases
- Liquids and Solids
- Atomic Structure
- Chemical Bonding
- Alcohols, Phenols And Ethers
- Solutions
- Chemical Equilibrium
- Electro Chemistry
- Periodic Classification Of Elements & Periodicity
- The Halogens and Noble Gases
- Group III A And IV A Elements
- S-Block Elements
- Fundamental Principles of Organic Chemistry