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Q39 (CAPF/2022) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic chemical principles Answer Verified

Calcium oxide reacts with water to produce slaked lime. It is an example of

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Your answer: —  Â·  Correct: A
Explanation

The reaction between calcium oxide (quicklime) and water to produce calcium hydroxide (slaked lime) is a classic example of a combination reaction. In this process, two distinct reactants—solid calcium oxide and liquid water—combine to form a single product, calcium hydroxide. The chemical equation is represented as CaO + H2O → Ca(OH)2. This specific reaction is highly exothermic, meaning it releases a significant amount of heat during the formation of the product. While the process is also referred to as the 'slaking of lime' or hydration, it fits the fundamental definition of a combination reaction because multiple substances merge into one. It is not a decomposition reaction, as that would involve a single reactant breaking down, nor is it primarily classified as an oxidation or addition reaction in this context.

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SIMILAR QUESTIONS

NDA-I · 2021 · Q77 Relevance score: 6.43

Reaction of ick lime (CaO) with water to produce slaked lime (Ca(OH)2) is an example of

CDS-I · 2021 · Q92 Relevance score: 6.24

Calcium oxide reacts vigorously with water to produce slaked lime whose solution is used for white-washing walls. This slaked lime reacts with component (A) in air to form a thin layer of component (B) to give a shiny finish. What are the components (A) and (B) ?

CDS-II · 2023 · Q52 Relevance score: 3.04

During white-washing of walls, slaked lime reacts slowly with carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Which of the following reactions represents this correctly?

CDS-I · 2023 · Q52 Relevance score: 1.62

Which of the following statements with regard to the reaction given below are correct? CaO(s) + H2O(l) → Ca(OH)2 (aq) + Heat 1. Quicklime is used for white-washing of walls. 2. The solution of slaked lime is used for whitewashing of walls. 3. CaO reacts slowly with CO2 in air to form a thin layer of CaCO3 on walls. 4. Calcium hydroxide called 'slaked lime' is an inorganic compound. Select the correct answer using the code given below.

CDS-II · 2014 · Q25 Relevance score: 0.26

When carbon dioxide is passed through lime water, the solution turns milky, but, on prolonged passage, the solution turns clear. This is because