MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The probability of finding an electron is zero in pxy along __________ |
| A. | x-axis |
| B. | y-axis |
| C. | z-axis |
| D. | never zero |
| Answer» D. never zero | |
| 2. |
Which of the following is the correct expression for the magnetic moment of the electron? |
| A. | \(\sqrt{n+1}\) |
| B. | \(\sqrt{n(n+1)}\) |
| C. | \(\sqrt{n(n+2)}\) |
| D. | \(\sqrt{m(n+1)}\) |
| Answer» D. \(\sqrt{m(n+1)}\) | |
| 3. |
Calculate the minimum uncertainty in the momentum of a 4He atom confined to 0.40 nm. |
| A. | 2.02 X 10-25 kg m/s |
| B. | 2.53 X 10-25 kg m/s |
| C. | 2.64 X 10-25 kg m/s |
| D. | 2.89 X 10-25 kg m/s |
| Answer» D. 2.89 X 10-25 kg m/s | |
| 4. |
S-orbitals have no angular node. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Identify the orbital for the following probability density graph. |
| A. | 1s |
| B. | 2s |
| C. | 2p |
| D. | 3s |
| Answer» C. 2p | |
| 6. |
For which quantum number, the probability of finding an electron is most? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 7. |
Arrange in the increasing number of radial nodes: 3p, 4s, 1s, 5d. |
| A. | 1s < 3p < 4s < 5d |
| B. | 1s < 4s < 3p < 5d |
| C. | 1s < 3p < 5d < 4s |
| D. | 5d < 1s < 3p < 4s |
| Answer» D. 5d < 1s < 3p < 4s | |
| 8. |
The probability of finding an electron is along two directions in which orbital? |
| A. | s |
| B. | p |
| C. | d |
| D. | p |
| Answer» D. p | |
| 9. |
For a 3p orbital, what are the total number of nodes? |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 0 |
| Answer» C. 1 | |
| 10. |
If Ψ is the wave function, the probability density function is given by _____________ |
| A. | |Ψ| |
| B. | |Ψ|2 |
| C. | |Ψ|3 |
| D. | |Ψ|4 |
| Answer» C. |Ψ|3 | |
| 11. |
What orbital never has a zero probability of finding electrons? |
| A. | s |
| B. | px |
| C. | dxy |
| D. | dz2 |
| Answer» E. | |
| 12. |
Which of the following is the correct expression for the total number of nodes? |
| A. | n – 1 |
| B. | l – 1 |
| C. | l + 1 |
| D. | n + 1 |
| Answer» B. l – 1 | |
| 13. |
The electron probability density is greatest at ____________ |
| A. | r = 0 |
| B. | r = n |
| C. | r = l |
| D. | r = me |
| Answer» B. r = n | |