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. |
How many allotropes does nitrogen have? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» B. One | |
| 2. |
Which group does the name pnictogens refer to? |
| A. | Group 11 |
| B. | Group 13 |
| C. | Group 15 |
| D. | Group 14 |
| Answer» D. Group 14 | |
| 3. |
When liquid nitrogen is poured onto the hand, it slips away without affecting the hand actually. What is this phenomenon called? |
| A. | Kaye effect |
| B. | Kinetic isotope effect |
| C. | Kondo effect |
| D. | Leiden frost effect |
| Answer» E. | |
| 4. |
What is the name of the natural process that is responsible for replenishing N2 back in the atmosphere from NO3 ? |
| A. | Nitrification |
| B. | Nitrogen fixation |
| C. | De-nitrification |
| D. | Nitrate fixation |
| Answer» D. Nitrate fixation | |
| 5. |
Which oxide of nitrogen is released from car engines? |
| A. | Nitrogen dioxide |
| B. | Nitric oxide |
| C. | Nitrous oxide |
| D. | Nitrogen tetroxide |
| Answer» C. Nitrous oxide | |
| 6. |
Why is nitrogen preferably used in welding process and cooling of substances? |
| A. | It s a gas and can easily be handled |
| B. | It has an extremely low freezing point |
| C. | It is an inert gas |
| D. | It is non-toxic |
| Answer» D. It is non-toxic | |
| 7. |
Why does nitrogen show anomalous properties with respect to other elements in group 15? |
| A. | Nitrogen has low ionization enthalpy |
| B. | Nitrogen atomhas high inter-electronic repulsions |
| C. | Nitrogen molecule bears a triple bond |
| D. | Absence of vacant d-orbitals |
| Answer» E. | |
| 8. |
Nitrogen atom is represented at 147N. How many electrons does it need to attain the noble gas configuration? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 9. |
How many stable isotopes does the nitrogen atom have? |
| A. | 16 |
| B. | 20 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 10. |
Which of the following compounds can be used to obtain free nitrogen? |
| A. | NaNO<sub>2</sub> |
| B. | HNO<sub>2</sub> |
| C. | HNO<sub>3</sub> |
| D. | Ba<sub>3</sub>N<sub>2</sub> |
| Answer» B. HNO<sub>2</sub> | |