Define :

a. Chemical combination reaction
b. Endothermic reaction
c. Oxidation reaction.

Open in App

Solution

(a) $Chemical combination reaction$ :

Combination of two or more elements or compounds to give a single compound.

$2 H_{2} + O_{2} \to 2 H_{2} O$
$N_{2} + 3 H_{2} \to 2 N H_{3}$
(b.) $Endothermic reaction$

During such reactions, energy is absorbed. The enthalpy of products is higher than the enthalpy of reactants.
$N_{2} (g) + O_{2} (g) \to 2 N O (g) Δ H = + 180.5$ kJ
(c). $Oxidation reaction$

Oxidation is the loss of electrons or an increase in the oxidation number or loss of oxygen.
$N a \to N a^{+} + e^{-}$

Thus Na atom loses one electron and is oxidised to $N a^{+}$ ions.

Suggest Corrections

Similar questions

C(s) + O_{2} (g) \to {CO}_{2} (g) + Heat

{2Pb(NO}_{3})_{2} (s) Heat - - \to 2 PbO(s) + 4 {NO}_{2} (g) + O_{2} (g)

The reaction in which energy is absorbed is called as a/an _____________.

The following reaction is a/an –
$C + O_{2} \to C O_{2} + H e a t$

Join BYJU'S Learning Program