Identify the following reactions as endothermic or exothermic.
(i) $2 N a H C O_{3} + e n e r g y ⟶ N a_{2} C O_{3} + H_{2} O + C O_{2}$
(ii) $2 M g + O_{2} ⟶ 2 M g O + e n e r g y$

(i) Exothermic (ii) Endothermic

No worries! We‘ve got your back. Try BYJU‘S free classes today!

(i) Endothermic (ii) Exothermic

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

(i) Exothermic (ii) Exothermic

No worries! We‘ve got your back. Try BYJU‘S free classes today!

(i) Endothermic (ii) Endothermic

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B (i) Endothermic (ii) Exothermic
Reaction with the absorption of energy is called an endothermic reaction.
In the reaction
(i) Sodium Bicarbonate needs the energy to form sodium carbonate, water, and carbon dioxide.
Hence it is an endothermic reaction.

Reaction with the release of energy is called an exothermic reaction.
(ii) on the burning of magnesium metal with oxygen gas, magnesium oxide is formed by the release of energy in the form of heat and light.
Hence it is an exothermic reaction.

Suggest Corrections

Similar questions

Q. Identify the following reactions as endothermic or exothermic
(i)

2 N a H C O_{3} + H e a t e n e r g y \to N a_{2} C O_{3} + H_{2} O + C O_{2}

(ii)

2 M g + O_{2} \to 2 M g O + e n e r g y

Q. Which of these changes does a burning matchstick undergo?
(i) Endothermic reaction
(ii) Exothermic reaction
(iii) Chemical change

Q. (a) What do you understand by exothermic and endothermic reactions?
(b) Give one example of an exothermic reaction and one of an endothermic reaction.
(c) Which of the following are endothermic reactions and which are exothermic reactions?
(i) Burning of natural gas
(ii) Photosynthesis
(iii) Electrolysis of water
(iv) Respiration
(v) Decomposition of calcium carbonate

Q. The following reaction is an example of a

2 P b (N O_{3})_{2} (s) H e a t - -- \to 2 P b O (s) + 4 N O_{2} (g) + O_{2} (g)

I. Combination reaction
II. Decomposition reaction
III. Endothermic reaction
IV. Exothermic reaction

The following reaction is an example of a
$2 P b (N O_{3})_{2} (s) H e a t - -- \to 2 P b O (s) + 4 N O_{2} (g) + O_{2} (g)$
I. Combination reaction
II. Decomposition reaction
III. Endothermic reaction
IV. Exothermic reaction

Join BYJU'S Learning Program

Identify the following reactions as endothermic or exothermic.(i) 2NaHCO3+energy⟶Na2CO3+H2O+CO2(ii) 2Mg+O2⟶2MgO+energy

Identify the following reactions as endothermic or exothermic.
(i) $2 N a H C O_{3} + e n e r g y ⟶ N a_{2} C O_{3} + H_{2} O + C O_{2}$
(ii) $2 M g + O_{2} ⟶ 2 M g O + e n e r g y$