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. | sp2 hybridized |
| B. | sp3 hybridized |
| C. | sp hybridized |
| D. | No hybridization |
| Answer» E. | |
| 5. |
What is the reaction involved in Holmes signal? |
| A. | Ca3P2 + 6H2O → 2PH3 + 3Ca(OH) 2 |
| B. | Ca3P2 + 6H2O → 2PH3 → P2H4 + P4O6 and CaC2 + H2O → C2H2 |
| C. | Ca3P2 + 6HCl → 2PH3 + 3CaCl2 |
| D. | P4 + 3NaOH + 3H2O → PH3 + 3NaH2PO2 |
| Answer» C. Ca3P2 + 6HCl → 2PH3 + 3CaCl2 | |
| 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 P2H4 |
| 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 | |