Question

1 mole of calcium phosphide on reaction with excess of water gives:

• A. 1 mole of phosphine
• B. 2 mole of phosphine
• C. 2 mole of phosphoric acid
• D. 1 thole of phosphorus pentoxide

Answer 1

The correct option is B 2 mole of phosphine

$C{a}_3{P}_2+6H_{2}O\to 3Ca(OH{)}_2+2P{H}_3$
1 mole Calcium phosiphide when reacts with excess of water gives 2 moles of phosphine.
Hence option B is correct.