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 s

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Q: 52 (CDS-I/2023)
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.

question_subject: 

Chemistry

question_exam: 

CDS-I

Slaked lime, or calcium hydroxide (Ca(OH)2), is used for whitewashing. It is an inorganic compound. Quicklime (CaO) reacts with water to form slaked lime. Statement 3 is true, but statement 1 is incorrect for whitewashing purposes.