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. |
Which of the following period is the shortest one? |
| A. | 1 |
| B. | 3 |
| C. | 2 |
| D. | 4 |
| Answer» B. 3 | |
| 2. |
Which was the incomplete period in the long-form of the modern periodic table? |
| A. | 7th period |
| B. | 4th period |
| C. | 6th period |
| D. | 2nd period |
| Answer» B. 4th period | |
| 3. |
The period’s number corresponds to the highest _________ |
| A. | Azimuthal quantum number |
| B. | Spin quantum number |
| C. | Magnetic quantum number |
| D. | Principal quantum number |
| Answer» E. | |
| 4. |
In the modern long-form of periodic table, the horizontal rows and the vertical columns are called as __________ and ___________ respectively. |
| A. | groups, periods |
| B. | periods, groups |
| C. | rows, columns |
| D. | columns, rows |
| Answer» C. rows, columns | |
| 5. |
The horizontal rows in Mendeleev’s periodic table were called as __________ |
| A. | periods |
| B. | groups |
| C. | series |
| D. | rows |
| Answer» D. rows | |
| 6. |
Henry Moseley’s law is given by the equation \(\sqrt{v}\) = a(Z – b). What do a and b represent here? |
| A. | The proportionality constant, screening constant |
| B. | . What do a and b represent here?a) The proportionality constant, screening constantb) Screening constant, proportionality constant |
| C. | Absorption constant, proportionality constant |
| D. | screening constant, Boltzmann constant |
| Answer» B. . What do a and b represent here?a) The proportionality constant, screening constantb) Screening constant, proportionality constant | |
| 7. |
What does Z represent in the above graph? |
| A. | Atomic mass |
| B. | Atomic number |
| C. | Frequency |
| D. | Wavelength |
| Answer» C. Frequency | |
| 8. |
The physical and chemical properties of an element are the periodic function of its _________ |
| A. | Atomic mass |
| B. | Element behaviour |
| C. | No of electrons |
| D. | Atomic number |
| Answer» E. | |
| 9. |
The graph of \(\sqrt{v}\) Vs Z gives a straight line. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
____________ observed the X-rays’ characteristics. |
| A. | Henry Moseley |
| B. | Mendeleev |
| C. | Pauli |
| D. | Newland |
| Answer» B. Mendeleev | |