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. |
Phosphine like ammonia has very high affinity for water. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following compounds react with water to give phosphine? |
| A. | Phosphorous trichloride |
| B. | Phosphorous pentachloride |
| C. | Black phosphorous |
| D. | Aluminium phosphide |
| Answer» E. | |
| 3. |
What is the structure of phosphine? |
| A. | Trigonal pyramidal |
| B. | Trigonal bi-pyramidal |
| C. | Rhombohedral |
| D. | Pyramidal |
| Answer» B. Trigonal bi-pyramidal | |
| 4. |
What is the hybridization of phosphine? |
| A. | sp<sup>2</sup> hybridized |
| B. | sp<sup>3</sup> hybridized |
| C. | sp hybridized |
| D. | No hybridization |
| Answer» E. | |
| 5. |
What is the reaction involved in Holmes signal? |
| A. | Ca<sub>3</sub>P<sub>2</sub> + 6H<sub>2</sub>O 2PH<sub>3</sub> + 3Ca(OH) <sub>2</sub> |
| B. | Ca<sub>3</sub>P<sub>2</sub> + 6H<sub>2</sub>O 2PH<sub>3</sub> P<sub>2</sub>H<sub>4</sub> + P<sub>4</sub>O<sub>6</sub> and CaC<sub>2</sub> + H<sub>2</sub>O C<sub>2</sub>H<sub>2</sub> |
| C. | Ca<sub>3</sub>P<sub>2</sub> + 6HCl 2PH<sub>3</sub> + 3CaCl<sub>2</sub> |
| D. | P<sub>4</sub> + 3NaOH + 3H<sub>2</sub>O PH<sub>3</sub> + 3NaH<sub>2</sub>PO<sub>2</sub> |
| Answer» C. Ca<sub>3</sub>P<sub>2</sub> + 6HCl 2PH<sub>3</sub> + 3CaCl<sub>2</sub> | |
| 6. |
Which of the following gas is used as Holmes signal? |
| A. | Hydrogen per oxide |
| B. | Nitrogen |
| C. | Acetylene |
| D. | Phosphine |
| Answer» E. | |
| 7. |
Which of the following is a property of phosphine? |
| A. | It is insoluble in water |
| B. | It is inflammable |
| C. | The solution of phosphine in water decomposes in the presence of light |
| D. | It acts as a Lewis acid |
| Answer» D. It acts as a Lewis acid | |
| 8. |
Phosphine is prepared from which of the following methods? |
| A. | By reacting calcium phosphide with water or dilute HCl |
| B. | By directly reacting phosphorous with hydrogen |
| C. | By passing dry chlorine over P<sub>2</sub>H<sub>4</sub> |
| D. | Heating while phosphorous with halides |
| Answer» B. By directly reacting phosphorous with hydrogen | |
| 9. |
Phosphine acts as a Lewis acid. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Which of the following is not true about phosphine? |
| A. | Phosphine is a colorless gas |
| B. | Phosphine has a rotten fish smell |
| C. | Phosphine is inflammable |
| D. | Phosphine is highly poisonous |
| Answer» D. Phosphine is highly poisonous | |