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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) ?
Consider the pairs. S.No Reaction Example 1. Combination Limestone changing into quicklime in the presence of heat 2. Decomposition reaction when Iron nails are dipped in copper sulphate solution 3. Displacement Calcium oxide and water producing slaked lime Which among the above pairs is correct?
Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar.Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.Select your answer according to the codes given below:
Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar.
Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.
Select your answer according to the codes given below:
Study the following statements.
(i) Hydraulic lime is suitable for white washing,
(ii) Fat lime is suitable for whitewashing,
(iii) Hydraulic lime is suitable for making mortar,
(iv) Fat lime is suitable for making mortar.
This compound is conventionally used for the whitewashing of buildings. Which of the following statements is/are true about it. 1. It is obtained by treating quick lime with water. 2. It is produced when calcium carbide reacts with water. 3. It is one of the raw materials used for the manufacture of Portland cement. 4. It is called slaked lime and its chemical formula is Ca(OH)2. Select the correct answer using the code given below:
Quick lime reacts with water to give slaked lime and heat. What type of reaction is this?
Which of the following is incorrect about the formation of slaked lime from quick lime?
Slaked lime is __________
To make lime plaster, limestone (calcium carbonate) is heated above approximately 50 °C to produce quicklime.