Question

One mole of calcium phosphide on reaction with excess water gives

• A. one mole of phosphine
• B. two moles of phosphoric acid
• C. two moles of phosphine
• D. one mole of phosphorus pentaoxide

Answer 1

Answer: (C)

two moles of phosphine

Answer 2

$Ca_3P_2 + 6H_2O \longrightarrow 3Ca(OH)_2 + 2PH_3$