Question

Hydrogen can be ottained from water, by the action of water on
(1) calcium carbide
(2) calcium hydride
(3) calcium oxide
(4) calcium

• A. 1, 2 and 3 are correct
• B. 1 and 2 are correct
• C. 2 and 4 are correct
• D. 1 and 3 are correct

Answer 1

Answer: (C)

$CaH _{2}+2 H _{2} O \longrightarrow Ca ( OH )_{2}+2 H _{2} \uparrow $
$Ca +2 H _{2} O \longrightarrow Ca ( OH )_{2}+ H _{2} \uparrow$
Calcium carbide with water gives acetylene and calcium oxide with water gives calcium hydroxide.