MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
x. p h/4 . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
An object has a mass of 6 kg and velocity of 10 m/s. The speed is measured with 5% accuracy, then find out x in m. |
| A. | 0.12676 x 10<sup>-34</sup> |
| B. | 0.1566 x 10<sup>-34</sup> |
| C. | 0.176 x 10<sup>-34</sup> |
| D. | 0.276 x 10<sup>-34</sup> |
| Answer» D. 0.276 x 10<sup>-34</sup> | |
| 3. |
If the kinetic energy of an electron is 5J. Find out its wavelength. |
| A. | 0.313 x 10<sup>15</sup> m/s |
| B. | 3.013 x 10<sup>15</sup> m/s |
| C. | 3.310 x 10<sup>15</sup> m/s |
| D. | 3.313 x 10<sup>15</sup> m/s |
| Answer» E. | |
| 4. |
If the uncertainties in position and momentum are equal, then the uncertainty in position is given by ____ |
| A. | h/4 |
| B. | h4 |
| C. | h/4 |
| D. | h/ |
| Answer» B. h4 | |
| 5. |
The uncertainty of a ball is given by 0.5A . Then calculate the uncertainty in momentum. |
| A. | 2.055 x 10<sup>-24</sup> kgm/s |
| B. | 1.015 x 10<sup>-24</sup> kgm/s |
| C. | 1.055 x 10<sup>-24</sup> kgm/s |
| D. | 1.095 x 10<sup>-24</sup> kgm/s |
| Answer» D. 1.095 x 10<sup>-24</sup> kgm/s | |
| 6. |
As per Heisenberg s principle of uncertainty, the relation between relative momentum and relative position is __________ |
| A. | independent |
| B. | equal |
| C. | directly proportional |
| D. | inversely proportional |
| Answer» E. | |
| 7. |
Determining the exact position and velocity of an electron is impossible at a time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Mass of a photon is given by 3.313 x 10-34 kg. Find it s wavelength. |
| A. | 0.67A |
| B. | 0.67nm |
| C. | 0.37A |
| D. | 1.67A |
| Answer» B. 0.67nm | |
| 9. |
A ball of mass 0.5kg is moving with velocity 6.626 m/s. What s the wavelength of that ball? |
| A. | 1 x 10<sup>-34</sup> m |
| B. | 2 x 10<sup>-34</sup> m |
| C. | 2 x 10<sup>-32</sup> m |
| D. | 2 x 10<sup>-3</sup> m |
| Answer» C. 2 x 10<sup>-32</sup> m | |
| 10. |
Who found out about dual behavior of a matter? |
| A. | De Broglie |
| B. | Bohr |
| C. | Rutherford |
| D. | Thomson |
| Answer» B. Bohr | |