Question

calicium plus water gives rise to calicium hydroxide plus hydrogen

Answer 1

$\large{\underline{\boxed{ Answer}}}$

Ca + 2H2O → Ca(OH)2 + H2↑

It is a combination reaction in which calcium reacts with water to gives slaked lime and releases heat along with hydrogen gas.

It is an exothermic reaction.

Combination reaction :- The reaction in which two and more reactants react together to give a simple product is called combination reaction.

It's general form is

A + B →AB