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. |
Calculate the minimum uncertainty in the momentum of a 4He atom confined to 0.40 nm. |
| A. | 2.02 X 10<sup>-25</sup> kg m/s |
| B. | 2.53 X 10<sup>-25</sup> kg m/s |
| C. | 2.64 X 10<sup>-25</sup> kg m/s |
| D. | 2.89 X 10<sup>-25</sup> kg m/s |
| Answer» D. 2.89 X 10<sup>-25</sup> kg m/s | |
| 3. |
S-orbitals have no angular node. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
For which quantum number, the probability of finding an electron is most? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 5. |
Which of the following can be the quantum numbers for an orbital? |
| A. | n = 4, l = 4, m = 3 |
| B. | n = 2, l = 3, m = 1 |
| C. | n = 3, l = 2, m = -1 |
| D. | n = 3, l = 0, m = -3 |
| Answer» D. n = 3, l = 0, m = -3 | |
| 6. |
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 | |
| 7. |
The probability of finding an electron is along two directions in which orbital? |
| A. | s |
| B. | p |
| C. | d |
| D. | p |
| Answer» D. p | |
| 8. |
For a 3p orbital, what are the total number of nodes? |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 0 |
| Answer» C. 1 | |
| 9. |
If is the wave function, the probability density function is given by _____________ |
| A. | | | |
| B. | | |<sup>2</sup> |
| C. | | |<sup>3</sup> |
| D. | | |<sup>4</sup> |
| Answer» C. | |<sup>3</sup> | |
| 10. |
Nodes are the plane where the probability of finding an electron is 1. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
What orbital never has a zero probability of finding electrons? |
| A. | s |
| B. | px |
| C. | d<sub>xy</sub> |
| D. | d<sub>z</sub><sup>2</sup> |
| 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 = m<sub>e</sub> |
| Answer» B. r = n | |