Exothermic reactions are chemical reactions that release energy, typically in the form of heat or light. Endothermic reactions absorb energy. Displacement reactions involve one element displacing another from a compound. Decomposition reactions involve a single compound breaking down into simpler substances. The reaction of quick lime with water fits the definition of an exothermic reaction due to the large heat release, also sometimes classified as a combination reaction.
Reaction of quick lime (CaO) with water to produce slaked lime (Ca(OH)₂) is an example of
Asked in UPSC NDA 1 2021 · Topic: Physical and Chemical Changes, Solution (Energy Changes in Chemical Reactions (Exothermic and Endothermic Processes))
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Answer: D. Exothermic reaction.
More Chemistry questions
- Which one of the following is an example of endothermic reaction?
- Which one among the following is an example of endothermic process ?
- A reaction is spontaneous when
- Mg (s) + O₂ (g) → MgO (s) + energy, this reaction may be classified as a/an
- Combination Reaction Two or more reactants (Mg and O₂) combine to form a single product (MgO). This fits the definition of a combination reaction. 2. Oxidation Reaction Magnesium (Mg) reacts with Oxygen (O₂). In this reaction, Mg loses electrons (its oxidation state changes from 0 to +2) and is oxidized. The reaction with oxygen is a classic example involving oxidation. 3. Exothermic Reaction The term "+ energy" on the product side indicates that energy is released during the reaction. Reactions that release energy are classified as exothermic reactions.Since the reaction fits the description of a Combination reaction, an Oxidation reaction, and an Exothermic reaction, all the individual classifications listed are correct. 189. Which of the following are exothermic processes ? Choose the correct option : - Reaction of water with quick lime - Dilution of sulphuric acid - Evaporation of water - Sublimation of camphor (crystals) - Question not attempted
- The decomposition of vegetable matter into compost is an example of -
- An example of endothermic reaction is : - Question not attempted
- Which one of the following evolve heat when merged in water?