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 pentoxide

Answer 1

Answer: The correct answer is Option c.

Explanation:

Calcium phosphide when reacted with water, it produces phosphine and calcium oxide as products.

The chemical reaction of calcium phosphide with water follows the equation:

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

By Stoichiometry of the reaction:

1 mole of calcium phosphide reacts with 6 moles of water to produce 2 moles of phosphine and 3 moles of calcium hydroxide.

Hence, the correct answer is Option c.

Answer 2

Answer:

c

Explanation:

two moles of phosphine