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 compounds contain phosphorus with an oxidation state of +5? |
| A. | Peroxodiphosphoric acid |
| B. | Hypophosphorous acid |
| C. | Orthophosphorous acid |
| D. | Hypophosphoric acid |
| Answer» B. Hypophosphorous acid | |
| 2. |
What is the temperature at which orthophosphoric acid forms pyrophosphoric acid? |
| A. | 673 K |
| B. | 523 K |
| C. | 423 K |
| D. | 700 K |
| Answer» C. 423 K | |
| 3. |
What is the oxidation state of phosphorus in hypophosphoric acid? |
| A. | +1 |
| B. | +2 |
| C. | +3 |
| D. | +4 |
| Answer» E. | |
| 4. |
What is the total number of atoms or groups surrounding each phosphorus atom in its oxoacids? |
| A. | 5 |
| B. | 6 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 5. |
What is the basicity of pyrophosphoric acid? |
| A. | Monobasic |
| B. | Tribasic |
| C. | Dibasic |
| D. | Tetrabasic |
| Answer» D. Tetrabasic | |
| 6. |
How many P-H bonds does hypophosphorous acid contain? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 7. |
Orthophosphorous acid can be made from phosphorous trioxide. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following is incorrect about Hypophosphorous acid? |
| A. | It is also called phosphonic acid |
| B. | The oxidation state of phosphorus is +1 |
| C. | It is monobasic |
| D. | It is represented by the formula H<sub>3</sub>PO<sub>2</sub> |
| Answer» B. The oxidation state of phosphorus is +1 | |
| 9. |
What is the range of the oxidation states shown by phosphorus in its oxoacids? |
| A. | +1 to +3 |
| B. | +2 to +4 |
| C. | +1 to +2 |
| D. | +1 to +5 |
| Answer» E. | |
| 10. |
Phosphorus does not form oxoacids. |
| A. | True |
| B. | False |
| Answer» C. | |