Question

One mole of calcium phosphide on reaction with excess of water gives__________.

• A. One mole of phosphine
• B. Two moles of phosphoric acid
• C. Two moles of phosphine
• D. One mole of phosphorous penta-oxide

Answer 1

Answer: (C)

Two moles of phosphine

One mole of calcium phosphide on reaction with excess of water gives Two moles of phosphine
$C{a}_3{P}_2+6H_{2}O\to 2P{H}_3+3Ca(OH{)}_2$
Hence option C is correct.