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Lime reacts exothermally with water to give ‘A’ which has low solubility in water. Aqueous solution of ‘A’ is often used for the test of CO 2 , a test in which insoluble B is formed. If B is further reacted with CO 2 then soluble compound is formed. ‘A’ is

1. Quick lime
2. Staked lime
3. White lime
4. Lime water

Correct answer: Staked lime

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