2 Aahaana Asked: October 18, 20202020-10-18T08:58:31+00:00 2020-10-18T08:58:31+00:00In: Class 10 What does one mean by exothermic and endothermic reactions? Give examples. 2 NCERT Solution for Class 10 Science Chapter 1 Chemical Reactions and Equations Exercises Questions Page No-15 Questions No-9 cbseclass10ncertscience Share Facebook 4 Answers Voted Oldest Recent Best Answer Uchit 2020-12-05T05:35:10+00:00Added an answer on December 5, 2020 at 5:35 am Exothermic Reaction: Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions. For example: Burning of methane in air gives heat and light. CH₄ (g)+O₂ (g) → CO₂ (g)+2H₂O(g)+heat Endothermic Reaction: Reactions that absorb energy or require energy in order to proceed are called endothermic reactions. For example: Silver chloride absorb the heat from sunlight and get decomposed into Silver and Chlorine. 2AgCl(s) Sunlight → 2Ag(s)+Cl₂(g) For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-1/ 2 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Baldev 2021-02-01T15:38:32+00:00Added an answer on February 1, 2021 at 3:38 pm Exothermic reaction: A reaction in which energy is released in the form of heat or light. Eg.: Burning of Natural gas (methane) CH4(g) + O2(g) → CO2(g) + H2O(l) + Heat Endothermic reaction: A reaction in which energy is absorbed from the surroundings and cooling is produced. Eg.: Decomposition of calcium carbonate CaCO3(s) ————-→ CaO(s) + CO2(g) Calcium Carbonate Calcium oxide Carbon dioxide or Lime stone or quick lime 1 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Tanvi.Devkar 2021-04-21T14:42:05+00:00Added an answer on April 21, 2021 at 2:42 pm Exothermic reaction- Reaction in which heat is released along with th formation of products. EX:-Burning of gas CH4(g)+O2(g) —– CO2(g) H2O(l)+Heat Methane+Oxygen —— Carbon-dioxide+Water+Heat (∆) Endothermic reaction:-Reation in which energy is absorbed. EX:-Decomposition of calcium carbonate. CaCo3(s) —– CaO(s)+CO2(g) Calcium carbonate —– Calcium-Oxide+ Carbon-dioxide. THANK YOU. 1 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Anshita 2021-02-04T09:00:25+00:00Added an answer on February 4, 2021 at 9:00 am Exothermic reaction – A reaction in which heat is released is called the exothermic reaction. Burning of fuel is an example of exothermic reaction. When methane is burnt it gives heat along with carbon dioxide and water. CH4(g) + O2(g) → CO2(g) + H2O(l) + Heat Endothermic reaction – A reaction in which heat is absorbed is called endothermic reaction. Example – When silver chloride is left in the sunlight, it absorbs heat and turns grey because of formation of silver metal. 2AgCl(s) Sunlight → 2Ag(s)+Cl₂(g) 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerLeave an answerCancel reply Featured image Select file Browse Click on image to update the captcha. Save my name, email, and website in this browser for the next time I comment.