Question: One mole of calcium phosphide on reaction with excess of water gives [IIT 1999]
(a) One mole of phosphine
(b) Two moles of phosphoric acid
(c) Two moles of phosphine
(d) One mole of phosphorus pentoxide
Correct Answer: (c) Two moles of phosphine
![One mole of calcium phosphide on reaction with excess of water gives [IIT 1999] (a) One mole of phosphine (b) Two moles of phosphoric acid (c) Two moles of phosphine (d) One mole of phosphorus pentoxide](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwrJ46oouifhyiY_RG0ejeMgOnmDff9-eJcy7q13my5mW-2FY7dye1fdUQT5UzDxVuPt6MESH4DzPpEXIzZek__ZOTpBvdM6aBYyk9U033Jn77UvbHCrKC5Hh098QZgaKrxDipgtfU5tLSAqbgDILOWhdNtmpMnhdn5n7JEguASZpZvx1oi_R7K-hk/s1920/One%20mole%20of%20calcium%20phosphide%20on%20reaction%20with%20excess%20of%20water%20gives%20%5BIIT%201999%5D.jpg "One mole of calcium phosphide on reaction with excess of water gives [IIT 1999] (a) One mole of phosphine (b) Two moles of phosphoric acid (c) Two moles of phosphine (d) One mole of phosphorus pentoxide")