MCQOPTIONS
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MCQOPTIONS
| 1. |
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 | |